Remove SEH try blocks from a11y code.

22 files changed, 0 insertions, 777 deletions

diff --git a/accessible/windows/ia2/ia2Accessible.cpp b/accessible/windows/ia2/ia2Accessible.cpp
index c72719b517..97cd0d7881 100644
--- a/accessible/windows/ia2/ia2Accessible.cpp
+++ b/accessible/windows/ia2/ia2Accessible.cpp
@@ -63,8 +63,6 @@ ia2Accessible::QueryInterface(REFIID iid, void** ppv)
 STDMETHODIMP
 ia2Accessible::get_nRelations(long* aNRelations)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aNRelations)
     return E_INVALIDARG;
   *aNRelations = 0;
@@ -84,16 +82,12 @@ ia2Accessible::get_nRelations(long* aNRelations)
       (*aNRelations)++;
   }
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2Accessible::get_relation(long aRelationIndex,
                             IAccessibleRelation** aRelation)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aRelation || aRelationIndex < 0)
     return E_INVALIDARG;
   *aRelation = nullptr;
@@ -124,8 +118,6 @@ ia2Accessible::get_relation(long aRelationIndex,
   }
 
   return E_INVALIDARG;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -133,8 +125,6 @@ ia2Accessible::get_relations(long aMaxRelations,
                              IAccessibleRelation** aRelation,
                              long *aNRelations)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aRelation || !aNRelations || aMaxRelations <= 0)
     return E_INVALIDARG;
   *aNRelations = 0;
@@ -160,15 +150,11 @@ ia2Accessible::get_relations(long aMaxRelations,
     }
   }
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2Accessible::role(long* aRole)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aRole)
     return E_INVALIDARG;
   *aRole = 0;
@@ -204,15 +190,11 @@ ia2Accessible::role(long* aRole)
   }
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2Accessible::scrollTo(enum IA2ScrollType aScrollType)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
   if (acc->IsDefunct())
     return CO_E_OBJNOTCONNECTED;
@@ -222,16 +204,12 @@ ia2Accessible::scrollTo(enum IA2ScrollType aScrollType)
                         aScrollType);
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2Accessible::scrollToPoint(enum IA2CoordinateType aCoordType,
                               long aX, long aY)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
   if (acc->IsDefunct())
     return CO_E_OBJNOTCONNECTED;
@@ -244,8 +222,6 @@ ia2Accessible::scrollToPoint(enum IA2CoordinateType aCoordType,
   acc->ScrollToPoint(geckoCoordType, aX, aY);
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -253,8 +229,6 @@ ia2Accessible::get_groupPosition(long* aGroupLevel,
                                  long* aSimilarItemsInGroup,
                                  long* aPositionInGroup)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aGroupLevel || !aSimilarItemsInGroup || !aPositionInGroup)
     return E_INVALIDARG;
 
@@ -279,15 +253,11 @@ ia2Accessible::get_groupPosition(long* aGroupLevel,
   *aPositionInGroup = groupPos.posInSet;
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2Accessible::get_states(AccessibleStates* aStates)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aStates)
     return E_INVALIDARG;
   *aStates = 0;
@@ -347,50 +317,36 @@ ia2Accessible::get_states(AccessibleStates* aStates)
     *aStates |= IA2_STATE_PINNED;
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2Accessible::get_extendedRole(BSTR* aExtendedRole)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aExtendedRole)
     return E_INVALIDARG;
 
   *aExtendedRole = nullptr;
   return E_NOTIMPL;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2Accessible::get_localizedExtendedRole(BSTR* aLocalizedExtendedRole)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aLocalizedExtendedRole)
     return E_INVALIDARG;
 
   *aLocalizedExtendedRole = nullptr;
   return E_NOTIMPL;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2Accessible::get_nExtendedStates(long* aNExtendedStates)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aNExtendedStates)
     return E_INVALIDARG;
 
   *aNExtendedStates = 0;
   return E_NOTIMPL;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -398,16 +354,12 @@ ia2Accessible::get_extendedStates(long aMaxExtendedStates,
                                   BSTR** aExtendedStates,
                                   long* aNExtendedStates)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aExtendedStates || !aNExtendedStates)
     return E_INVALIDARG;
 
   *aExtendedStates = nullptr;
   *aNExtendedStates = 0;
   return E_NOTIMPL;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -415,38 +367,28 @@ ia2Accessible::get_localizedExtendedStates(long aMaxLocalizedExtendedStates,
                                            BSTR** aLocalizedExtendedStates,
                                            long* aNLocalizedExtendedStates)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aLocalizedExtendedStates || !aNLocalizedExtendedStates)
     return E_INVALIDARG;
 
   *aLocalizedExtendedStates = nullptr;
   *aNLocalizedExtendedStates = 0;
   return E_NOTIMPL;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2Accessible::get_uniqueID(long* aUniqueID)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aUniqueID)
     return E_INVALIDARG;
 
   AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
   *aUniqueID = AccessibleWrap::GetChildIDFor(acc);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2Accessible::get_windowHandle(HWND* aWindowHandle)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aWindowHandle)
     return E_INVALIDARG;
   *aWindowHandle = 0;
@@ -457,15 +399,11 @@ ia2Accessible::get_windowHandle(HWND* aWindowHandle)
 
   *aWindowHandle = AccessibleWrap::GetHWNDFor(acc);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2Accessible::get_indexInParent(long* aIndexInParent)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aIndexInParent)
     return E_INVALIDARG;
   *aIndexInParent = -1;
@@ -481,15 +419,11 @@ ia2Accessible::get_indexInParent(long* aIndexInParent)
     return S_FALSE;
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2Accessible::get_locale(IA2Locale* aLocale)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aLocale)
     return E_INVALIDARG;
 
@@ -532,15 +466,11 @@ ia2Accessible::get_locale(IA2Locale* aLocale)
   // country abbreviations or if there are more than one subcode.
   aLocale->variant = ::SysAllocString(lang.get());
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2Accessible::get_attributes(BSTR* aAttributes)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aAttributes)
     return E_INVALIDARG;
   *aAttributes = nullptr;
@@ -558,8 +488,6 @@ ia2Accessible::get_attributes(BSTR* aAttributes)
 
   MOZ_ASSERT(!acc->IsProxy());
   return E_UNEXPECTED;
-
-  A11Y_TRYBLOCK_END
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -568,22 +496,16 @@ ia2Accessible::get_attributes(BSTR* aAttributes)
 STDMETHODIMP
 ia2Accessible::get_attribute(BSTR name, VARIANT* aAttribute)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aAttribute)
     return E_INVALIDARG;
 
   return E_NOTIMPL;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2Accessible::get_accessibleWithCaret(IUnknown** aAccessible,
                                        long* aCaretOffset)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aAccessible || !aCaretOffset)
     return E_INVALIDARG;
 
@@ -611,8 +533,6 @@ ia2Accessible::get_accessibleWithCaret(IUnknown** aAccessible,
   (*aAccessible)->AddRef();
   *aCaretOffset = caretOffset;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -621,8 +541,6 @@ ia2Accessible::get_relationTargetsOfType(BSTR aType,
                                          IUnknown*** aTargets,
                                          long* aNTargets)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aTargets || !aNTargets || aMaxTargets < 0)
     return E_INVALIDARG;
   *aNTargets = 0;
@@ -663,16 +581,12 @@ ia2Accessible::get_relationTargetsOfType(BSTR aType,
   }
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2Accessible::get_selectionRanges(IA2Range** aRanges,
                                    long *aNRanges)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aRanges || !aNRanges)
     return E_INVALIDARG;
 
@@ -714,8 +628,6 @@ ia2Accessible::get_selectionRanges(IA2Range** aRanges,
   }
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 
diff --git a/accessible/windows/ia2/ia2AccessibleAction.cpp b/accessible/windows/ia2/ia2AccessibleAction.cpp
index 0710b753f5..ffd19f0492 100644
--- a/accessible/windows/ia2/ia2AccessibleAction.cpp
+++ b/accessible/windows/ia2/ia2AccessibleAction.cpp
@@ -39,8 +39,6 @@ ia2AccessibleAction::QueryInterface(REFIID iid, void** ppv)
 STDMETHODIMP
 ia2AccessibleAction::nActions(long* aActionCount)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aActionCount)
     return E_INVALIDARG;
 
@@ -52,30 +50,22 @@ ia2AccessibleAction::nActions(long* aActionCount)
 
   *aActionCount = acc->ActionCount();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleAction::doAction(long aActionIndex)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   AccessibleWrap* acc = static_cast<AccessibleWrap*>(this);
   if (acc->IsDefunct())
     return CO_E_OBJNOTCONNECTED;
 
   uint8_t index = static_cast<uint8_t>(aActionIndex);
   return acc->DoAction(index) ? S_OK : E_INVALIDARG;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleAction::get_description(long aActionIndex, BSTR *aDescription)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aDescription)
     return E_INVALIDARG;
   *aDescription = nullptr;
@@ -93,8 +83,6 @@ ia2AccessibleAction::get_description(long aActionIndex, BSTR *aDescription)
   *aDescription = ::SysAllocStringLen(description.get(),
                                       description.Length());
   return *aDescription ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -102,8 +90,6 @@ ia2AccessibleAction::get_keyBinding(long aActionIndex, long aNumMaxBinding,
                                   BSTR **aKeyBinding,
                                   long *aNumBinding)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aKeyBinding)
     return E_INVALIDARG;
   *aKeyBinding = nullptr;
@@ -143,15 +129,11 @@ ia2AccessibleAction::get_keyBinding(long aActionIndex, long aNumMaxBinding,
 
   *aNumBinding = 1;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleAction::get_name(long aActionIndex, BSTR *aName)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aName)
     return E_INVALIDARG;
 
@@ -169,20 +151,14 @@ ia2AccessibleAction::get_name(long aActionIndex, BSTR *aName)
 
   *aName = ::SysAllocStringLen(name.get(), name.Length());
   return *aName ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleAction::get_localizedName(long aActionIndex, BSTR *aLocalizedName)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aLocalizedName)
     return E_INVALIDARG;
 
   *aLocalizedName = nullptr;
   return E_NOTIMPL;
-
-  A11Y_TRYBLOCK_END
 }
diff --git a/accessible/windows/ia2/ia2AccessibleComponent.cpp b/accessible/windows/ia2/ia2AccessibleComponent.cpp
index f32c09d1e4..2c9cd0ab4d 100644
--- a/accessible/windows/ia2/ia2AccessibleComponent.cpp
+++ b/accessible/windows/ia2/ia2AccessibleComponent.cpp
@@ -41,8 +41,6 @@ ia2AccessibleComponent::QueryInterface(REFIID iid, void** ppv)
 STDMETHODIMP
 ia2AccessibleComponent::get_locationInParent(long* aX, long* aY)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aX || !aY)
     return E_INVALIDARG;
 
@@ -75,15 +73,11 @@ ia2AccessibleComponent::get_locationInParent(long* aX, long* aY)
   *aX = rect.x - parentRect.x;
   *aY = rect.y - parentRect.y;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleComponent::get_foreground(IA2Color* aForeground)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aForeground)
     return E_INVALIDARG;
 
@@ -98,15 +92,11 @@ ia2AccessibleComponent::get_foreground(IA2Color* aForeground)
     *aForeground = frame->StyleColor()->mColor;
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleComponent::get_background(IA2Color* aBackground)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aBackground)
     return E_INVALIDARG;
 
@@ -121,7 +111,5 @@ ia2AccessibleComponent::get_background(IA2Color* aBackground)
     *aBackground = frame->StyleBackground()->mBackgroundColor;
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
diff --git a/accessible/windows/ia2/ia2AccessibleEditableText.cpp b/accessible/windows/ia2/ia2AccessibleEditableText.cpp
index 361d6a1306..0b433bf6d7 100644
--- a/accessible/windows/ia2/ia2AccessibleEditableText.cpp
+++ b/accessible/windows/ia2/ia2AccessibleEditableText.cpp
@@ -22,8 +22,6 @@ using namespace mozilla::a11y;
 STDMETHODIMP
 ia2AccessibleEditableText::copyText(long aStartOffset, long aEndOffset)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   MOZ_ASSERT(!HyperTextProxyFor(this));
 
   HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
@@ -35,15 +33,11 @@ ia2AccessibleEditableText::copyText(long aStartOffset, long aEndOffset)
 
   textAcc->CopyText(aStartOffset, aEndOffset);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleEditableText::deleteText(long aStartOffset, long aEndOffset)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   MOZ_ASSERT(!HyperTextProxyFor(this));
 
   HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
@@ -55,15 +49,11 @@ ia2AccessibleEditableText::deleteText(long aStartOffset, long aEndOffset)
 
   textAcc->DeleteText(aStartOffset, aEndOffset);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleEditableText::insertText(long aOffset, BSTR *aText)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   uint32_t length = ::SysStringLen(*aText);
   nsAutoString text(*aText, length);
   MOZ_ASSERT(!HyperTextProxyFor(this));
@@ -77,15 +67,11 @@ ia2AccessibleEditableText::insertText(long aOffset, BSTR *aText)
 
   textAcc->InsertText(text, aOffset);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleEditableText::cutText(long aStartOffset, long aEndOffset)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   MOZ_ASSERT(!HyperTextProxyFor(this));
 
   HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
@@ -97,15 +83,11 @@ ia2AccessibleEditableText::cutText(long aStartOffset, long aEndOffset)
 
   textAcc->CutText(aStartOffset, aEndOffset);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleEditableText::pasteText(long aOffset)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   MOZ_ASSERT(!HyperTextProxyFor(this));
 
   HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
@@ -117,16 +99,12 @@ ia2AccessibleEditableText::pasteText(long aOffset)
 
   textAcc->PasteText(aOffset);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleEditableText::replaceText(long aStartOffset, long aEndOffset,
                                        BSTR *aText)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
   if (textAcc->IsDefunct())
     return CO_E_OBJNOTCONNECTED;
@@ -141,8 +119,6 @@ ia2AccessibleEditableText::replaceText(long aStartOffset, long aEndOffset,
   textAcc->InsertText(text, aStartOffset);
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
diff --git a/accessible/windows/ia2/ia2AccessibleHyperlink.cpp b/accessible/windows/ia2/ia2AccessibleHyperlink.cpp
index c6d564103f..d36c0ef252 100644
--- a/accessible/windows/ia2/ia2AccessibleHyperlink.cpp
+++ b/accessible/windows/ia2/ia2AccessibleHyperlink.cpp
@@ -45,8 +45,6 @@ ia2AccessibleHyperlink::QueryInterface(REFIID iid, void** ppv)
 STDMETHODIMP
 ia2AccessibleHyperlink::get_anchor(long aIndex, VARIANT* aAnchor)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aAnchor)
     return E_INVALIDARG;
 
@@ -77,15 +75,11 @@ ia2AccessibleHyperlink::get_anchor(long aIndex, VARIANT* aAnchor)
   aAnchor->punkVal = static_cast<IUnknown*>(instancePtr);
   aAnchor->vt = VT_UNKNOWN;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleHyperlink::get_anchorTarget(long aIndex, VARIANT* aAnchorTarget)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aAnchorTarget) {
     return E_INVALIDARG;
   }
@@ -124,15 +118,11 @@ ia2AccessibleHyperlink::get_anchorTarget(long aIndex, VARIANT* aAnchorTarget)
   aAnchorTarget->bstrVal = ::SysAllocStringLen(stringURI.get(),
                                                stringURI.Length());
   return aAnchorTarget->bstrVal ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleHyperlink::get_startIndex(long* aIndex)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aIndex)
     return E_INVALIDARG;
 
@@ -149,15 +139,11 @@ ia2AccessibleHyperlink::get_startIndex(long* aIndex)
 
   *aIndex = thisObj->StartOffset();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleHyperlink::get_endIndex(long* aIndex)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aIndex)
     return E_INVALIDARG;
 
@@ -174,15 +160,11 @@ ia2AccessibleHyperlink::get_endIndex(long* aIndex)
 
   *aIndex = thisObj->EndOffset();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleHyperlink::get_valid(boolean* aValid)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aValid)
     return E_INVALIDARG;
 
@@ -199,7 +181,5 @@ ia2AccessibleHyperlink::get_valid(boolean* aValid)
 
   *aValid = thisObj->IsLinkValid();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
diff --git a/accessible/windows/ia2/ia2AccessibleHypertext.cpp b/accessible/windows/ia2/ia2AccessibleHypertext.cpp
index f4b3bdaf25..555bde686a 100644
--- a/accessible/windows/ia2/ia2AccessibleHypertext.cpp
+++ b/accessible/windows/ia2/ia2AccessibleHypertext.cpp
@@ -19,8 +19,6 @@ using namespace mozilla::a11y;
 STDMETHODIMP
 ia2AccessibleHypertext::get_nHyperlinks(long* aHyperlinkCount)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aHyperlinkCount)
     return E_INVALIDARG;
 
@@ -34,16 +32,12 @@ ia2AccessibleHypertext::get_nHyperlinks(long* aHyperlinkCount)
 
   *aHyperlinkCount = hyperText->LinkCount();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleHypertext::get_hyperlink(long aLinkIndex,
                                       IAccessibleHyperlink** aHyperlink)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aHyperlink)
     return E_INVALIDARG;
 
@@ -65,15 +59,11 @@ ia2AccessibleHypertext::get_hyperlink(long aLinkIndex,
     static_cast<IAccessibleHyperlink*>(hyperLink);
   (*aHyperlink)->AddRef();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleHypertext::get_hyperlinkIndex(long aCharIndex, long* aHyperlinkIndex)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aHyperlinkIndex)
     return E_INVALIDARG;
 
@@ -87,7 +77,5 @@ ia2AccessibleHypertext::get_hyperlinkIndex(long aCharIndex, long* aHyperlinkInde
 
   *aHyperlinkIndex = hyperAcc->LinkIndexAtOffset(aCharIndex);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
diff --git a/accessible/windows/ia2/ia2AccessibleImage.cpp b/accessible/windows/ia2/ia2AccessibleImage.cpp
index 989fde9250..7dc7f765c6 100644
--- a/accessible/windows/ia2/ia2AccessibleImage.cpp
+++ b/accessible/windows/ia2/ia2AccessibleImage.cpp
@@ -43,8 +43,6 @@ ia2AccessibleImage::QueryInterface(REFIID iid, void** ppv)
 STDMETHODIMP
 ia2AccessibleImage::get_description(BSTR* aDescription)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aDescription)
     return E_INVALIDARG;
 
@@ -61,8 +59,6 @@ ia2AccessibleImage::get_description(BSTR* aDescription)
 
   *aDescription = ::SysAllocStringLen(description.get(), description.Length());
   return *aDescription ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -70,8 +66,6 @@ ia2AccessibleImage::get_imagePosition(enum IA2CoordinateType aCoordType,
                                       long* aX,
                                       long* aY)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aX || !aY)
     return E_INVALIDARG;
 
@@ -90,15 +84,11 @@ ia2AccessibleImage::get_imagePosition(enum IA2CoordinateType aCoordType,
   *aX = pos.x;
   *aY = pos.y;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleImage::get_imageSize(long* aHeight, long* aWidth)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aHeight || !aWidth)
     return E_INVALIDARG;
 
@@ -113,7 +103,5 @@ ia2AccessibleImage::get_imageSize(long* aHeight, long* aWidth)
   *aHeight = size.width;
   *aWidth = size.height;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
diff --git a/accessible/windows/ia2/ia2AccessibleRelation.cpp b/accessible/windows/ia2/ia2AccessibleRelation.cpp
index cc6fd83c8a..67435ee52c 100644
--- a/accessible/windows/ia2/ia2AccessibleRelation.cpp
+++ b/accessible/windows/ia2/ia2AccessibleRelation.cpp
@@ -34,8 +34,6 @@ IMPL_IUNKNOWN_QUERY_TAIL
 STDMETHODIMP
 ia2AccessibleRelation::get_relationType(BSTR* aRelationType)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aRelationType)
     return E_INVALIDARG;
 
@@ -51,43 +49,31 @@ ia2AccessibleRelation::get_relationType(BSTR* aRelationType)
   }
 
   return *aRelationType ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleRelation::get_localizedRelationType(BSTR *aLocalizedRelationType)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aLocalizedRelationType)
     return E_INVALIDARG;
 
   *aLocalizedRelationType = nullptr;
   return E_NOTIMPL;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleRelation::get_nTargets(long *aNTargets)
 {
-  A11Y_TRYBLOCK_BEGIN
-
  if (!aNTargets)
    return E_INVALIDARG;
 
  *aNTargets = mTargets.Length();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleRelation::get_target(long aTargetIndex, IUnknown **aTarget)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (aTargetIndex < 0 || (uint32_t)aTargetIndex >= mTargets.Length() || !aTarget)
     return E_INVALIDARG;
 
@@ -97,16 +83,12 @@ ia2AccessibleRelation::get_target(long aTargetIndex, IUnknown **aTarget)
   (*aTarget)->AddRef();
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleRelation::get_targets(long aMaxTargets, IUnknown **aTargets,
                                    long *aNTargets)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aNTargets || !aTargets)
     return E_INVALIDARG;
 
@@ -120,6 +102,4 @@ ia2AccessibleRelation::get_targets(long aMaxTargets, IUnknown **aTargets,
 
   *aNTargets = maxTargets;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
diff --git a/accessible/windows/ia2/ia2AccessibleTable.cpp b/accessible/windows/ia2/ia2AccessibleTable.cpp
index 6ac6bbab4e..a99f72defc 100644
--- a/accessible/windows/ia2/ia2AccessibleTable.cpp
+++ b/accessible/windows/ia2/ia2AccessibleTable.cpp
@@ -60,8 +60,6 @@ ia2AccessibleTable::get_accessibleAt(long aRowIdx, long aColIdx,
 STDMETHODIMP
 ia2AccessibleTable::get_caption(IUnknown** aAccessible)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aAccessible)
     return E_INVALIDARG;
 
@@ -75,16 +73,12 @@ ia2AccessibleTable::get_caption(IUnknown** aAccessible)
 
   (*aAccessible = static_cast<IAccessible*>(caption))->AddRef();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_childIndex(long aRowIdx, long aColIdx,
                                    long* aChildIdx)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aChildIdx)
     return E_INVALIDARG;
 
@@ -99,15 +93,11 @@ ia2AccessibleTable::get_childIndex(long aRowIdx, long aColIdx,
 
   *aChildIdx = mTable->CellIndexAt(aRowIdx, aColIdx);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_columnDescription(long aColIdx, BSTR* aDescription)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aDescription)
     return E_INVALIDARG;
 
@@ -125,16 +115,12 @@ ia2AccessibleTable::get_columnDescription(long aColIdx, BSTR* aDescription)
 
   *aDescription = ::SysAllocStringLen(descr.get(), descr.Length());
   return *aDescription ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_columnExtentAt(long aRowIdx, long aColIdx,
                                       long* aSpan)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aSpan)
     return E_INVALIDARG;
 
@@ -149,31 +135,23 @@ ia2AccessibleTable::get_columnExtentAt(long aRowIdx, long aColIdx,
 
   *aSpan = mTable->ColExtentAt(aRowIdx, aColIdx);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_columnHeader(IAccessibleTable** aAccessibleTable,
                                     long* aStartingRowIndex)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aAccessibleTable || !aStartingRowIndex)
     return E_INVALIDARG;
 
   *aAccessibleTable = nullptr;
   *aStartingRowIndex = -1;
   return E_NOTIMPL;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_columnIndex(long aCellIdx, long* aColIdx)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aColIdx)
     return E_INVALIDARG;
 
@@ -187,15 +165,11 @@ ia2AccessibleTable::get_columnIndex(long aCellIdx, long* aColIdx)
 
   *aColIdx = mTable->ColIndexAt(aCellIdx);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_nColumns(long* aColCount)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aColCount)
     return E_INVALIDARG;
 
@@ -205,15 +179,11 @@ ia2AccessibleTable::get_nColumns(long* aColCount)
 
   *aColCount = mTable->ColCount();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_nRows(long* aRowCount)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aRowCount)
     return E_INVALIDARG;
 
@@ -223,8 +193,6 @@ ia2AccessibleTable::get_nRows(long* aRowCount)
 
   *aRowCount = mTable->RowCount();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -236,8 +204,6 @@ ia2AccessibleTable::get_nSelectedChildren(long* aChildCount)
 STDMETHODIMP
 ia2AccessibleTable::get_nSelectedColumns(long* aColCount)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aColCount)
     return E_INVALIDARG;
 
@@ -247,15 +213,11 @@ ia2AccessibleTable::get_nSelectedColumns(long* aColCount)
 
   *aColCount = mTable->SelectedColCount();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_nSelectedRows(long* aRowCount)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aRowCount)
     return E_INVALIDARG;
 
@@ -266,15 +228,11 @@ ia2AccessibleTable::get_nSelectedRows(long* aRowCount)
   *aRowCount = mTable->SelectedRowCount();
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_rowDescription(long aRowIdx, BSTR* aDescription)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aDescription)
     return E_INVALIDARG;
 
@@ -292,15 +250,11 @@ ia2AccessibleTable::get_rowDescription(long aRowIdx, BSTR* aDescription)
 
   *aDescription = ::SysAllocStringLen(descr.get(), descr.Length());
   return *aDescription ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_rowExtentAt(long aRowIdx, long aColIdx, long* aSpan)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aSpan)
     return E_INVALIDARG;
 
@@ -315,31 +269,23 @@ ia2AccessibleTable::get_rowExtentAt(long aRowIdx, long aColIdx, long* aSpan)
 
   *aSpan = mTable->RowExtentAt(aRowIdx, aColIdx);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_rowHeader(IAccessibleTable** aAccessibleTable,
                                   long* aStartingColumnIndex)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aAccessibleTable || !aStartingColumnIndex)
     return E_INVALIDARG;
 
   *aAccessibleTable = nullptr;
   *aStartingColumnIndex = -1;
   return E_NOTIMPL;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_rowIndex(long aCellIdx, long* aRowIdx)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aRowIdx)
     return E_INVALIDARG;
 
@@ -353,16 +299,12 @@ ia2AccessibleTable::get_rowIndex(long aCellIdx, long* aRowIdx)
 
   *aRowIdx = mTable->RowIndexAt(aCellIdx);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_selectedChildren(long aMaxChildren, long** aChildren,
                                          long* aNChildren)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aChildren || !aNChildren)
     return E_INVALIDARG;
 
@@ -384,36 +326,24 @@ ia2AccessibleTable::get_selectedChildren(long aMaxChildren, long** aChildren,
     (*aChildren)[i] = cellIndices[i];
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_selectedColumns(long aMaxColumns, long** aColumns,
                                         long* aNColumns)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   return get_selectedColumns(aColumns, aNColumns);
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_selectedRows(long aMaxRows, long** aRows, long* aNRows)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   return get_selectedRows(aRows, aNRows);
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_summary(IUnknown** aAccessible)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aAccessible)
     return E_INVALIDARG;
 
@@ -424,15 +354,11 @@ ia2AccessibleTable::get_summary(IUnknown** aAccessible)
 
   *aAccessible = nullptr;
   return S_FALSE;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_isColumnSelected(long aColIdx, boolean* aIsSelected)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aIsSelected)
     return E_INVALIDARG;
 
@@ -445,15 +371,11 @@ ia2AccessibleTable::get_isColumnSelected(long aColIdx, boolean* aIsSelected)
 
   *aIsSelected = mTable->IsColSelected(aColIdx);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_isRowSelected(long aRowIdx, boolean* aIsSelected)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aIsSelected)
     return E_INVALIDARG;
 
@@ -466,16 +388,12 @@ ia2AccessibleTable::get_isRowSelected(long aRowIdx, boolean* aIsSelected)
 
   *aIsSelected = mTable->IsRowSelected(aRowIdx);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_isSelected(long aRowIdx, long aColIdx,
                                    boolean* aIsSelected)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aIsSelected)
     return E_INVALIDARG;
 
@@ -490,15 +408,11 @@ ia2AccessibleTable::get_isSelected(long aRowIdx, long aColIdx,
 
   *aIsSelected = mTable->IsCellSelected(aRowIdx, aColIdx);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::selectRow(long aRowIdx)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!mTable)
     return CO_E_OBJNOTCONNECTED;
 
@@ -507,15 +421,11 @@ ia2AccessibleTable::selectRow(long aRowIdx)
 
   mTable->SelectRow(aRowIdx);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::selectColumn(long aColIdx)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!mTable)
     return CO_E_OBJNOTCONNECTED;
 
@@ -524,15 +434,11 @@ ia2AccessibleTable::selectColumn(long aColIdx)
 
   mTable->SelectCol(aColIdx);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::unselectRow(long aRowIdx)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!mTable)
     return CO_E_OBJNOTCONNECTED;
 
@@ -541,15 +447,11 @@ ia2AccessibleTable::unselectRow(long aRowIdx)
 
   mTable->UnselectRow(aRowIdx);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::unselectColumn(long aColIdx)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!mTable)
     return CO_E_OBJNOTCONNECTED;
 
@@ -558,8 +460,6 @@ ia2AccessibleTable::unselectColumn(long aColIdx)
 
   mTable->UnselectCol(aColIdx);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -569,8 +469,6 @@ ia2AccessibleTable::get_rowColumnExtentsAtIndex(long aCellIdx, long* aRowIdx,
                                                 long* aColExtents,
                                                 boolean* aIsSelected)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aRowIdx || !aColIdx || !aRowExtents || !aColExtents || !aIsSelected)
     return E_INVALIDARG;
 
@@ -595,8 +493,6 @@ ia2AccessibleTable::get_rowColumnExtentsAtIndex(long aCellIdx, long* aRowIdx,
   *aIsSelected = mTable->IsCellSelected(rowIdx, colIdx);
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -611,8 +507,6 @@ ia2AccessibleTable::get_modelChange(IA2TableModelChange* aModelChange)
 STDMETHODIMP
 ia2AccessibleTable::get_cellAt(long aRowIdx, long aColIdx, IUnknown** aCell)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aCell)
     return E_INVALIDARG;
 
@@ -628,15 +522,11 @@ ia2AccessibleTable::get_cellAt(long aRowIdx, long aColIdx, IUnknown** aCell)
 
   (*aCell = static_cast<IAccessible*>(cell))->AddRef();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_nSelectedCells(long* aCellCount)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aCellCount)
     return E_INVALIDARG;
 
@@ -646,15 +536,11 @@ ia2AccessibleTable::get_nSelectedCells(long* aCellCount)
 
   *aCellCount = mTable->SelectedCellCount();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_selectedCells(IUnknown*** aCells, long* aNSelectedCells)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aCells || !aNSelectedCells)
     return E_INVALIDARG;
 
@@ -682,15 +568,11 @@ ia2AccessibleTable::get_selectedCells(IUnknown*** aCells, long* aNSelectedCells)
 
   *aNSelectedCells = cells.Length();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_selectedColumns(long** aColumns, long* aNColumns)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aColumns || !aNColumns)
     return E_INVALIDARG;
 
@@ -712,15 +594,11 @@ ia2AccessibleTable::get_selectedColumns(long** aColumns, long* aNColumns)
     (*aColumns)[i] = colIndices[i];
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTable::get_selectedRows(long** aRows, long* aNRows)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aRows || !aNRows)
     return E_INVALIDARG;
 
@@ -742,6 +620,4 @@ ia2AccessibleTable::get_selectedRows(long** aRows, long* aNRows)
     (*aRows)[i] = rowIndices[i];
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
diff --git a/accessible/windows/ia2/ia2AccessibleTableCell.cpp b/accessible/windows/ia2/ia2AccessibleTableCell.cpp
index e625a70495..19cfc55dab 100644
--- a/accessible/windows/ia2/ia2AccessibleTableCell.cpp
+++ b/accessible/windows/ia2/ia2AccessibleTableCell.cpp
@@ -46,8 +46,6 @@ ia2AccessibleTableCell::QueryInterface(REFIID iid, void** ppv)
 STDMETHODIMP
 ia2AccessibleTableCell::get_table(IUnknown** aTable)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aTable)
     return E_INVALIDARG;
 
@@ -63,15 +61,11 @@ ia2AccessibleTableCell::get_table(IUnknown** aTable)
   *aTable = static_cast<IAccessible*>(wrap);
   (*aTable)->AddRef();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTableCell::get_columnExtent(long* aSpan)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aSpan)
     return E_INVALIDARG;
 
@@ -82,16 +76,12 @@ ia2AccessibleTableCell::get_columnExtent(long* aSpan)
   *aSpan = mTableCell->ColExtent();
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTableCell::get_columnHeaderCells(IUnknown*** aCellAccessibles,
                                               long* aNColumnHeaderCells)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aCellAccessibles || !aNColumnHeaderCells)
     return E_INVALIDARG;
 
@@ -118,15 +108,11 @@ ia2AccessibleTableCell::get_columnHeaderCells(IUnknown*** aCellAccessibles,
   }
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTableCell::get_columnIndex(long* aColIdx)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aColIdx)
     return E_INVALIDARG;
 
@@ -136,15 +122,11 @@ ia2AccessibleTableCell::get_columnIndex(long* aColIdx)
 
   *aColIdx = mTableCell->ColIdx();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTableCell::get_rowExtent(long* aSpan)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aSpan)
     return E_INVALIDARG;
 
@@ -154,16 +136,12 @@ ia2AccessibleTableCell::get_rowExtent(long* aSpan)
 
   *aSpan = mTableCell->RowExtent();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTableCell::get_rowHeaderCells(IUnknown*** aCellAccessibles,
                                            long* aNRowHeaderCells)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aCellAccessibles || !aNRowHeaderCells)
     return E_INVALIDARG;
 
@@ -189,15 +167,11 @@ ia2AccessibleTableCell::get_rowHeaderCells(IUnknown*** aCellAccessibles,
   }
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTableCell::get_rowIndex(long* aRowIdx)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aRowIdx)
     return E_INVALIDARG;
 
@@ -207,8 +181,6 @@ ia2AccessibleTableCell::get_rowIndex(long* aRowIdx)
 
   *aRowIdx = mTableCell->RowIdx();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -217,8 +189,6 @@ ia2AccessibleTableCell::get_rowColumnExtents(long* aRowIdx, long* aColIdx,
                                              long* aColExtents,
                                              boolean* aIsSelected)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aRowIdx || !aColIdx || !aRowExtents || !aColExtents || !aIsSelected)
     return E_INVALIDARG;
 
@@ -234,15 +204,11 @@ ia2AccessibleTableCell::get_rowColumnExtents(long* aRowIdx, long* aColIdx,
   *aIsSelected = mTableCell->Selected();
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleTableCell::get_isSelected(boolean* aIsSelected)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aIsSelected)
     return E_INVALIDARG;
 
@@ -252,6 +218,4 @@ ia2AccessibleTableCell::get_isSelected(boolean* aIsSelected)
 
   *aIsSelected = mTableCell->Selected();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
diff --git a/accessible/windows/ia2/ia2AccessibleText.cpp b/accessible/windows/ia2/ia2AccessibleText.cpp
index 7ac766f300..86b3abdf61 100644
--- a/accessible/windows/ia2/ia2AccessibleText.cpp
+++ b/accessible/windows/ia2/ia2AccessibleText.cpp
@@ -28,8 +28,6 @@ bool ia2AccessibleText::sLastTextChangeWasInsert = false;
 STDMETHODIMP
 ia2AccessibleText::addSelection(long aStartOffset, long aEndOffset)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   MOZ_ASSERT(!HyperTextProxyFor(this));
 
   HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
@@ -38,16 +36,12 @@ ia2AccessibleText::addSelection(long aStartOffset, long aEndOffset)
 
   return textAcc->AddToSelection(aStartOffset, aEndOffset) ?
     S_OK : E_INVALIDARG;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleText::get_attributes(long aOffset, long *aStartOffset,
                                   long *aEndOffset, BSTR *aTextAttributes)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aStartOffset || !aEndOffset || !aTextAttributes)
     return E_INVALIDARG;
 
@@ -74,15 +68,11 @@ ia2AccessibleText::get_attributes(long aOffset, long *aStartOffset,
   *aEndOffset = endOffset;
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleText::get_caretOffset(long *aOffset)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aOffset)
     return E_INVALIDARG;
 
@@ -97,8 +87,6 @@ ia2AccessibleText::get_caretOffset(long *aOffset)
   *aOffset = textAcc->CaretOffset();
 
   return *aOffset != -1 ? S_OK : S_FALSE;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -107,8 +95,6 @@ ia2AccessibleText::get_characterExtents(long aOffset,
                                         long* aX, long* aY,
                                         long* aWidth, long* aHeight)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aX || !aY || !aWidth || !aHeight)
     return E_INVALIDARG;
   *aX = *aY = *aWidth = *aHeight = 0;
@@ -129,15 +115,11 @@ ia2AccessibleText::get_characterExtents(long aOffset,
   *aWidth = rect.width;
   *aHeight = rect.height;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleText::get_nSelections(long* aNSelections)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aNSelections)
     return E_INVALIDARG;
   *aNSelections = 0;
@@ -151,8 +133,6 @@ ia2AccessibleText::get_nSelections(long* aNSelections)
   *aNSelections = textAcc->SelectionCount();
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -160,8 +140,6 @@ ia2AccessibleText::get_offsetAtPoint(long aX, long aY,
                                      enum IA2CoordinateType aCoordType,
                                      long* aOffset)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aOffset)
     return E_INVALIDARG;
   *aOffset = 0;
@@ -179,16 +157,12 @@ ia2AccessibleText::get_offsetAtPoint(long aX, long aY,
   *aOffset = textAcc->OffsetAtPoint(aX, aY, geckoCoordType);
 
   return *aOffset == -1 ? S_FALSE : S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleText::get_selection(long aSelectionIndex, long* aStartOffset,
                                  long* aEndOffset)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aStartOffset || !aEndOffset)
     return E_INVALIDARG;
   *aStartOffset = *aEndOffset = 0;
@@ -207,15 +181,11 @@ ia2AccessibleText::get_selection(long aSelectionIndex, long* aStartOffset,
   *aStartOffset = startOffset;
   *aEndOffset = endOffset;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleText::get_text(long aStartOffset, long aEndOffset, BSTR* aText)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aText)
     return E_INVALIDARG;
 
@@ -239,8 +209,6 @@ ia2AccessibleText::get_text(long aStartOffset, long aEndOffset, BSTR* aText)
 
   *aText = ::SysAllocStringLen(text.get(), text.Length());
   return *aText ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -249,8 +217,6 @@ ia2AccessibleText::get_textBeforeOffset(long aOffset,
                                         long* aStartOffset, long* aEndOffset,
                                         BSTR* aText)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aStartOffset || !aEndOffset || !aText)
     return E_INVALIDARG;
 
@@ -287,8 +253,6 @@ ia2AccessibleText::get_textBeforeOffset(long aOffset,
 
   *aText = ::SysAllocStringLen(text.get(), text.Length());
   return *aText ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -297,8 +261,6 @@ ia2AccessibleText::get_textAfterOffset(long aOffset,
                                        long* aStartOffset, long* aEndOffset,
                                        BSTR* aText)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aStartOffset || !aEndOffset || !aText)
     return E_INVALIDARG;
 
@@ -335,8 +297,6 @@ ia2AccessibleText::get_textAfterOffset(long aOffset,
 
   *aText = ::SysAllocStringLen(text.get(), text.Length());
   return *aText ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -345,8 +305,6 @@ ia2AccessibleText::get_textAtOffset(long aOffset,
                                     long* aStartOffset, long* aEndOffset,
                                     BSTR* aText)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aStartOffset || !aEndOffset || !aText)
     return E_INVALIDARG;
 
@@ -381,15 +339,11 @@ ia2AccessibleText::get_textAtOffset(long aOffset,
 
   *aText = ::SysAllocStringLen(text.get(), text.Length());
   return *aText ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleText::removeSelection(long aSelectionIndex)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   MOZ_ASSERT(!HyperTextProxyFor(this));
 
   HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
@@ -398,15 +352,11 @@ ia2AccessibleText::removeSelection(long aSelectionIndex)
 
   return textAcc->RemoveFromSelection(aSelectionIndex) ?
     S_OK : E_INVALIDARG;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleText::setCaretOffset(long aOffset)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   MOZ_ASSERT(!HyperTextProxyFor(this));
 
   HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
@@ -418,16 +368,12 @@ ia2AccessibleText::setCaretOffset(long aOffset)
 
   textAcc->SetCaretOffset(aOffset);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleText::setSelection(long aSelectionIndex, long aStartOffset,
                                 long aEndOffset)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   MOZ_ASSERT(!HyperTextProxyFor(this));
 
   HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
@@ -436,15 +382,11 @@ ia2AccessibleText::setSelection(long aSelectionIndex, long aStartOffset,
 
   return textAcc->SetSelectionBoundsAt(aSelectionIndex, aStartOffset, aEndOffset) ?
     S_OK : E_INVALIDARG;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleText::get_nCharacters(long* aNCharacters)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aNCharacters)
     return E_INVALIDARG;
   *aNCharacters = 0;
@@ -457,16 +399,12 @@ ia2AccessibleText::get_nCharacters(long* aNCharacters)
 
   *aNCharacters  = textAcc->CharacterCount();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleText::scrollSubstringTo(long aStartIndex, long aEndIndex,
                                      enum IA2ScrollType aScrollType)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   MOZ_ASSERT(!HyperTextProxyFor(this));
 
   HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
@@ -478,8 +416,6 @@ ia2AccessibleText::scrollSubstringTo(long aStartIndex, long aEndIndex,
 
   textAcc->ScrollSubstringTo(aStartIndex, aEndIndex, aScrollType);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -487,8 +423,6 @@ ia2AccessibleText::scrollSubstringToPoint(long aStartIndex, long aEndIndex,
                                           enum IA2CoordinateType aCoordType,
                                           long aX, long aY)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   uint32_t geckoCoordType = (aCoordType == IA2_COORDTYPE_SCREEN_RELATIVE) ?
     nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE :
     nsIAccessibleCoordinateType::COORDTYPE_PARENT_RELATIVE;
@@ -505,28 +439,18 @@ ia2AccessibleText::scrollSubstringToPoint(long aStartIndex, long aEndIndex,
   textAcc->ScrollSubstringToPoint(aStartIndex, aEndIndex,
                                   geckoCoordType, aX, aY);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleText::get_newText(IA2TextSegment *aNewText)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   return GetModifiedText(true, aNewText);
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleText::get_oldText(IA2TextSegment *aOldText)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   return GetModifiedText(false, aOldText);
-
-  A11Y_TRYBLOCK_END
 }
 
 // ia2AccessibleText
diff --git a/accessible/windows/ia2/ia2AccessibleValue.cpp b/accessible/windows/ia2/ia2AccessibleValue.cpp
index e334422956..44d2c31fb7 100644
--- a/accessible/windows/ia2/ia2AccessibleValue.cpp
+++ b/accessible/windows/ia2/ia2AccessibleValue.cpp
@@ -46,8 +46,6 @@ ia2AccessibleValue::QueryInterface(REFIID iid, void** ppv)
 STDMETHODIMP
 ia2AccessibleValue::get_currentValue(VARIANT* aCurrentValue)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aCurrentValue)
     return E_INVALIDARG;
 
@@ -68,15 +66,11 @@ ia2AccessibleValue::get_currentValue(VARIANT* aCurrentValue)
   aCurrentValue->vt = VT_R8;
   aCurrentValue->dblVal = currentValue;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleValue::setCurrentValue(VARIANT aValue)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (aValue.vt != VT_R8)
     return E_INVALIDARG;
 
@@ -87,15 +81,11 @@ ia2AccessibleValue::setCurrentValue(VARIANT aValue)
     return CO_E_OBJNOTCONNECTED;
 
   return valueAcc->SetCurValue(aValue.dblVal) ? S_OK : E_FAIL;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleValue::get_maximumValue(VARIANT* aMaximumValue)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aMaximumValue)
     return E_INVALIDARG;
 
@@ -116,15 +106,11 @@ ia2AccessibleValue::get_maximumValue(VARIANT* aMaximumValue)
   aMaximumValue->vt = VT_R8;
   aMaximumValue->dblVal = maximumValue;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ia2AccessibleValue::get_minimumValue(VARIANT* aMinimumValue)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aMinimumValue)
     return E_INVALIDARG;
 
@@ -145,7 +131,5 @@ ia2AccessibleValue::get_minimumValue(VARIANT* aMinimumValue)
   aMinimumValue->vt = VT_R8;
   aMinimumValue->dblVal = minimumValue;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
diff --git a/accessible/windows/msaa/AccessibleWrap.cpp b/accessible/windows/msaa/AccessibleWrap.cpp
index 6112c370a1..4262708147 100644
--- a/accessible/windows/msaa/AccessibleWrap.cpp
+++ b/accessible/windows/msaa/AccessibleWrap.cpp
@@ -110,8 +110,6 @@ AccessibleWrap::Shutdown()
 STDMETHODIMP
 AccessibleWrap::QueryInterface(REFIID iid, void** ppv)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!ppv)
     return E_INVALIDARG;
 
@@ -165,8 +163,6 @@ AccessibleWrap::QueryInterface(REFIID iid, void** ppv)
 
   (reinterpret_cast<IUnknown*>(*ppv))->AddRef();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 //-----------------------------------------------------
@@ -176,8 +172,6 @@ AccessibleWrap::QueryInterface(REFIID iid, void** ppv)
 STDMETHODIMP
 AccessibleWrap::get_accParent( IDispatch __RPC_FAR *__RPC_FAR *ppdispParent)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!ppdispParent)
     return E_INVALIDARG;
 
@@ -208,15 +202,11 @@ AccessibleWrap::get_accParent( IDispatch __RPC_FAR *__RPC_FAR *ppdispParent)
 
   *ppdispParent = NativeAccessible(xpParentAcc);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 AccessibleWrap::get_accChildCount( long __RPC_FAR *pcountChildren)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!pcountChildren)
     return E_INVALIDARG;
 
@@ -230,8 +220,6 @@ AccessibleWrap::get_accChildCount( long __RPC_FAR *pcountChildren)
 
   *pcountChildren = ChildCount();
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -239,8 +227,6 @@ AccessibleWrap::get_accChild(
       /* [in] */ VARIANT varChild,
       /* [retval][out] */ IDispatch __RPC_FAR *__RPC_FAR *ppdispChild)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!ppdispChild)
     return E_INVALIDARG;
 
@@ -265,8 +251,6 @@ AccessibleWrap::get_accChild(
 
   child.forget(ppdispChild);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 /**
@@ -331,8 +315,6 @@ AccessibleWrap::get_accName(
       /* [optional][in] */ VARIANT varChild,
       /* [retval][out] */ BSTR __RPC_FAR *pszName)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!pszName || varChild.vt != VT_I4)
     return E_INVALIDARG;
 
@@ -361,8 +343,6 @@ AccessibleWrap::get_accName(
   if (!*pszName)
     return E_OUTOFMEMORY;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 
@@ -371,8 +351,6 @@ AccessibleWrap::get_accValue(
       /* [optional][in] */ VARIANT varChild,
       /* [retval][out] */ BSTR __RPC_FAR *pszValue)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!pszValue)
     return E_INVALIDARG;
 
@@ -401,16 +379,12 @@ AccessibleWrap::get_accValue(
   if (!*pszValue)
     return E_OUTOFMEMORY;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 AccessibleWrap::get_accDescription(VARIANT varChild,
                                    BSTR __RPC_FAR *pszDescription)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!pszDescription)
     return E_INVALIDARG;
 
@@ -432,8 +406,6 @@ AccessibleWrap::get_accDescription(VARIANT varChild,
   *pszDescription = ::SysAllocStringLen(description.get(),
                                         description.Length());
   return *pszDescription ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -441,8 +413,6 @@ AccessibleWrap::get_accRole(
       /* [optional][in] */ VARIANT varChild,
       /* [retval][out] */ VARIANT __RPC_FAR *pvarRole)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!pvarRole)
     return E_INVALIDARG;
 
@@ -532,8 +502,6 @@ AccessibleWrap::get_accRole(
   }
 
   return E_FAIL;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -541,8 +509,6 @@ AccessibleWrap::get_accState(
       /* [optional][in] */ VARIANT varChild,
       /* [retval][out] */ VARIANT __RPC_FAR *pvarState)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!pvarState)
     return E_INVALIDARG;
 
@@ -574,8 +540,6 @@ AccessibleWrap::get_accState(
   nsAccUtils::To32States(state, &msaaState, nullptr);
   pvarState->lVal = msaaState;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 
@@ -584,15 +548,11 @@ AccessibleWrap::get_accHelp(
       /* [optional][in] */ VARIANT varChild,
       /* [retval][out] */ BSTR __RPC_FAR *pszHelp)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!pszHelp)
     return E_INVALIDARG;
 
   *pszHelp = nullptr;
   return S_FALSE;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -601,16 +561,12 @@ AccessibleWrap::get_accHelpTopic(
       /* [optional][in] */ VARIANT varChild,
       /* [retval][out] */ long __RPC_FAR *pidTopic)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!pszHelpFile || !pidTopic)
     return E_INVALIDARG;
 
   *pszHelpFile = nullptr;
   *pidTopic = 0;
   return S_FALSE;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -618,8 +574,6 @@ AccessibleWrap::get_accKeyboardShortcut(
       /* [optional][in] */ VARIANT varChild,
       /* [retval][out] */ BSTR __RPC_FAR *pszKeyboardShortcut)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!pszKeyboardShortcut)
     return E_INVALIDARG;
   *pszKeyboardShortcut = nullptr;
@@ -645,16 +599,12 @@ AccessibleWrap::get_accKeyboardShortcut(
   *pszKeyboardShortcut = ::SysAllocStringLen(shortcut.get(),
                                              shortcut.Length());
   return *pszKeyboardShortcut ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 AccessibleWrap::get_accFocus(
       /* [retval][out] */ VARIANT __RPC_FAR *pvarChild)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!pvarChild)
     return E_INVALIDARG;
 
@@ -685,8 +635,6 @@ AccessibleWrap::get_accFocus(
   }
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 /**
@@ -723,8 +671,6 @@ private:
 STDMETHODIMP
 AccessibleEnumerator::QueryInterface(REFIID iid, void ** ppvObject)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (iid == IID_IEnumVARIANT) {
     *ppvObject = static_cast<IEnumVARIANT*>(this);
     AddRef();
@@ -738,15 +684,11 @@ AccessibleEnumerator::QueryInterface(REFIID iid, void ** ppvObject)
 
   *ppvObject = nullptr;
   return E_NOINTERFACE;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 AccessibleEnumerator::Next(unsigned long celt, VARIANT FAR* rgvar, unsigned long FAR* pceltFetched)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   uint32_t length = mArray.Length();
   HRESULT hr = S_OK;
 
@@ -766,29 +708,21 @@ AccessibleEnumerator::Next(unsigned long celt, VARIANT FAR* rgvar, unsigned long
     *pceltFetched = celt;
 
   return hr;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 AccessibleEnumerator::Clone(IEnumVARIANT FAR* FAR* ppenum)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   *ppenum = new AccessibleEnumerator(*this);
   if (!*ppenum)
     return E_OUTOFMEMORY;
   NS_ADDREF(*ppenum);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 AccessibleEnumerator::Skip(unsigned long celt)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   uint32_t length = mArray.Length();
   // Check if we can skip the requested number of elements
   if (celt > length - mCurIndex) {
@@ -797,8 +731,6 @@ AccessibleEnumerator::Skip(unsigned long celt)
   }
   mCurIndex += celt;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 /**
@@ -821,8 +753,6 @@ AccessibleEnumerator::Skip(unsigned long celt)
 STDMETHODIMP
 AccessibleWrap::get_accSelection(VARIANT __RPC_FAR *pvarChildren)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!pvarChildren)
     return E_INVALIDARG;
 
@@ -842,8 +772,6 @@ AccessibleWrap::get_accSelection(VARIANT __RPC_FAR *pvarChildren)
     NS_ADDREF(pvarChildren->punkVal = pEnum);
   }
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -851,8 +779,6 @@ AccessibleWrap::get_accDefaultAction(
       /* [optional][in] */ VARIANT varChild,
       /* [retval][out] */ BSTR __RPC_FAR *pszDefaultAction)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!pszDefaultAction)
     return E_INVALIDARG;
 
@@ -874,8 +800,6 @@ AccessibleWrap::get_accDefaultAction(
   *pszDefaultAction = ::SysAllocStringLen(defaultAction.get(),
                                           defaultAction.Length());
   return *pszDefaultAction ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -883,8 +807,6 @@ AccessibleWrap::accSelect(
       /* [in] */ long flagsSelect,
       /* [optional][in] */ VARIANT varChild)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   RefPtr<IAccessible> accessible;
   HRESULT hr = ResolveChild(varChild, getter_AddRefs(accessible));
   if (FAILED(hr)) {
@@ -926,8 +848,6 @@ AccessibleWrap::accSelect(
   }
 
   return E_FAIL;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -938,8 +858,6 @@ AccessibleWrap::accLocation(
       /* [out] */ long __RPC_FAR *pcyHeight,
       /* [optional][in] */ VARIANT varChild)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!pxLeft || !pyTop || !pcxWidth || !pcyHeight)
     return E_INVALIDARG;
 
@@ -966,8 +884,6 @@ AccessibleWrap::accLocation(
   *pcxWidth = rect.width;
   *pcyHeight = rect.height;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -976,8 +892,6 @@ AccessibleWrap::accNavigate(
       /* [optional][in] */ VARIANT varStart,
       /* [retval][out] */ VARIANT __RPC_FAR *pvarEndUpAt)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!pvarEndUpAt)
     return E_INVALIDARG;
 
@@ -1060,8 +974,6 @@ AccessibleWrap::accNavigate(
   pvarEndUpAt->pdispVal = NativeAccessible(navAccessible);
   pvarEndUpAt->vt = VT_DISPATCH;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -1070,8 +982,6 @@ AccessibleWrap::accHitTest(
       /* [in] */ long yTop,
       /* [retval][out] */ VARIANT __RPC_FAR *pvarChild)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!pvarChild)
     return E_INVALIDARG;
 
@@ -1098,16 +1008,12 @@ AccessibleWrap::accHitTest(
     return S_FALSE;
   }
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 AccessibleWrap::accDoDefaultAction(
       /* [optional][in] */ VARIANT varChild)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   RefPtr<IAccessible> accessible;
   HRESULT hr = ResolveChild(varChild, getter_AddRefs(accessible));
   if (FAILED(hr)) {
@@ -1119,8 +1025,6 @@ AccessibleWrap::accDoDefaultAction(
   }
 
   return DoAction(0) ? S_OK : E_INVALIDARG;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
diff --git a/accessible/windows/msaa/ApplicationAccessibleWrap.cpp b/accessible/windows/msaa/ApplicationAccessibleWrap.cpp
index b78a8dd557..ec9d511e46 100644
--- a/accessible/windows/msaa/ApplicationAccessibleWrap.cpp
+++ b/accessible/windows/msaa/ApplicationAccessibleWrap.cpp
@@ -69,8 +69,6 @@ ApplicationAccessibleWrap::QueryInterface(REFIID iid, void** ppv)
 STDMETHODIMP
 ApplicationAccessibleWrap::get_appName(BSTR* aName)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aName)
     return E_INVALIDARG;
 
@@ -86,15 +84,11 @@ ApplicationAccessibleWrap::get_appName(BSTR* aName)
 
   *aName = ::SysAllocStringLen(name.get(), name.Length());
   return *aName ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ApplicationAccessibleWrap::get_appVersion(BSTR* aVersion)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aVersion)
     return E_INVALIDARG;
 
@@ -110,15 +104,11 @@ ApplicationAccessibleWrap::get_appVersion(BSTR* aVersion)
 
   *aVersion = ::SysAllocStringLen(version.get(), version.Length());
   return *aVersion ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ApplicationAccessibleWrap::get_toolkitName(BSTR* aName)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aName)
     return E_INVALIDARG;
 
@@ -132,15 +122,11 @@ ApplicationAccessibleWrap::get_toolkitName(BSTR* aName)
 
   *aName = ::SysAllocStringLen(name.get(), name.Length());
   return *aName ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ApplicationAccessibleWrap::get_toolkitVersion(BSTR* aVersion)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aVersion)
     return E_INVALIDARG;
 
@@ -156,7 +142,5 @@ ApplicationAccessibleWrap::get_toolkitVersion(BSTR* aVersion)
 
   *aVersion = ::SysAllocStringLen(version.get(), version.Length());
   return *aVersion ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
diff --git a/accessible/windows/msaa/DocAccessibleWrap.cpp b/accessible/windows/msaa/DocAccessibleWrap.cpp
index 6fb89816db..895fe91925 100644
--- a/accessible/windows/msaa/DocAccessibleWrap.cpp
+++ b/accessible/windows/msaa/DocAccessibleWrap.cpp
@@ -65,8 +65,6 @@ DocAccessibleWrap::get_accParent(
 STDMETHODIMP
 DocAccessibleWrap::get_accValue(VARIANT aVarChild, BSTR __RPC_FAR* aValue)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aValue)
     return E_INVALIDARG;
   *aValue = nullptr;
@@ -90,8 +88,6 @@ DocAccessibleWrap::get_accValue(VARIANT aVarChild, BSTR __RPC_FAR* aValue)
 
   *aValue = ::SysAllocStringLen(url.get(), url.Length());
   return *aValue ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/accessible/windows/msaa/EnumVariant.cpp b/accessible/windows/msaa/EnumVariant.cpp
index 86c81a105c..2344208a35 100644
--- a/accessible/windows/msaa/EnumVariant.cpp
+++ b/accessible/windows/msaa/EnumVariant.cpp
@@ -21,8 +21,6 @@ STDMETHODIMP
 ChildrenEnumVariant::Next(ULONG aCount, VARIANT FAR* aItems,
                           ULONG FAR* aCountFetched)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aItems || !aCountFetched)
     return E_INVALIDARG;
 
@@ -55,15 +53,11 @@ ChildrenEnumVariant::Next(ULONG aCount, VARIANT FAR* aItems,
   (*aCountFetched) = countFetched;
 
   return countFetched < aCount ? S_FALSE : S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ChildrenEnumVariant::Skip(ULONG aCount)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (mAnchorAcc->IsDefunct() || mAnchorAcc->GetChildAt(mCurIndex) != mCurAcc)
     return CO_E_OBJNOTCONNECTED;
 
@@ -71,15 +65,11 @@ ChildrenEnumVariant::Skip(ULONG aCount)
   mCurAcc = mAnchorAcc->GetChildAt(mCurIndex);
 
   return mCurAcc ? S_OK : S_FALSE;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ChildrenEnumVariant::Reset()
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (mAnchorAcc->IsDefunct())
     return CO_E_OBJNOTCONNECTED;
 
@@ -87,15 +77,11 @@ ChildrenEnumVariant::Reset()
   mCurAcc = mAnchorAcc->GetChildAt(0);
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 ChildrenEnumVariant::Clone(IEnumVARIANT** aEnumVariant)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aEnumVariant)
     return E_INVALIDARG;
 
@@ -103,6 +89,4 @@ ChildrenEnumVariant::Clone(IEnumVARIANT** aEnumVariant)
   (*aEnumVariant)->AddRef();
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
diff --git a/accessible/windows/msaa/IUnknownImpl.cpp b/accessible/windows/msaa/IUnknownImpl.cpp
index 4a9fa5383b..c74f86e335 100644
--- a/accessible/windows/msaa/IUnknownImpl.cpp
+++ b/accessible/windows/msaa/IUnknownImpl.cpp
@@ -37,22 +37,5 @@ GetHRESULT(nsresult aResult)
   }
 }
 
-int
-FilterExceptions(unsigned int aCode, EXCEPTION_POINTERS* aExceptionInfo)
-{
-  if (aCode == EXCEPTION_ACCESS_VIOLATION) {
-#ifdef MOZ_CRASHREPORTER
-    // MSAA swallows crashes (because it is COM-based) but we still need to
-    // learn about those crashes so we can fix them. Make sure to pass them to
-    // the crash reporter.
-    CrashReporter::WriteMinidumpForException(aExceptionInfo);
-#endif
-  } else {
-    NS_NOTREACHED("We should only be catching crash exceptions");
-  }
-
-  return EXCEPTION_CONTINUE_SEARCH;
-}
-
 } // namespace a11y
 } // namespace mozilla
diff --git a/accessible/windows/msaa/IUnknownImpl.h b/accessible/windows/msaa/IUnknownImpl.h
index dbf6c1374f..d939a4dfad 100644
--- a/accessible/windows/msaa/IUnknownImpl.h
+++ b/accessible/windows/msaa/IUnknownImpl.h
@@ -79,7 +79,6 @@ virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID, void**);              \
 STDMETHODIMP                                                                   \
 Class::QueryInterface(REFIID aIID, void** aInstancePtr)                        \
 {                                                                              \
-  A11Y_TRYBLOCK_BEGIN                                                          \
   if (!aInstancePtr)                                                           \
     return E_INVALIDARG;                                                       \
   *aInstancePtr = nullptr;                                                     \
@@ -88,17 +87,14 @@ Class::QueryInterface(REFIID aIID, void** aInstancePtr)                        \
 
 #define IMPL_IUNKNOWN_QUERY_TAIL                                               \
   return hr;                                                                   \
-  A11Y_TRYBLOCK_END                                                            \
 }
 
 #define IMPL_IUNKNOWN_QUERY_TAIL_AGGREGATED(Member)                            \
   return Member->QueryInterface(aIID, aInstancePtr);                           \
-  A11Y_TRYBLOCK_END                                                            \
 }
 
 #define IMPL_IUNKNOWN_QUERY_TAIL_INHERITED(BaseClass)                          \
   return BaseClass::QueryInterface(aIID, aInstancePtr);                        \
-  A11Y_TRYBLOCK_END                                                            \
 }
 
 #define IMPL_IUNKNOWN_QUERY_IFACE(Iface)                                       \
@@ -158,21 +154,6 @@ Class::QueryInterface(REFIID aIID, void** aInstancePtr)                        \
   IMPL_IUNKNOWN_QUERY_CLASS(Super2);                                           \
   IMPL_IUNKNOWN_QUERY_TAIL_INHERITED(Super0)
 
-
-/**
- * Wrap every method body by these macroses to pass exception to the crash
- * reporter.
- */
-#define A11Y_TRYBLOCK_BEGIN                                                    \
-  MOZ_SEH_TRY {
-
-#define A11Y_TRYBLOCK_END                                                      \
-  } MOZ_SEH_EXCEPT(mozilla::a11y::FilterExceptions(::GetExceptionCode(),       \
-                                                   GetExceptionInformation())) \
-  { }                                                                          \
-  return E_FAIL;
-
-
 namespace mozilla {
 namespace a11y {
 
@@ -181,11 +162,6 @@ namespace a11y {
  */
 HRESULT GetHRESULT(nsresult aResult);
 
-/**
- * Used to pass an exception to the crash reporter.
- */
-int FilterExceptions(unsigned int aCode, EXCEPTION_POINTERS* aExceptionInfo);
-
 } // namespace a11y;
 } //namespace mozilla;
 
diff --git a/accessible/windows/sdn/sdnAccessible.cpp b/accessible/windows/sdn/sdnAccessible.cpp
index 909b0779c9..d90631c8f3 100644
--- a/accessible/windows/sdn/sdnAccessible.cpp
+++ b/accessible/windows/sdn/sdnAccessible.cpp
@@ -28,8 +28,6 @@ using namespace mozilla::a11y;
 STDMETHODIMP
 sdnAccessible::QueryInterface(REFIID aREFIID, void** aInstancePtr)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aInstancePtr)
     return E_FAIL;
   *aInstancePtr = nullptr;
@@ -53,8 +51,6 @@ sdnAccessible::QueryInterface(REFIID aREFIID, void** aInstancePtr)
   }
 
   return E_NOINTERFACE;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -65,8 +61,6 @@ sdnAccessible::get_nodeInfo(BSTR __RPC_FAR* aNodeName,
                             unsigned int __RPC_FAR* aUniqueID,
                             unsigned short __RPC_FAR* aNodeType)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aNodeName || !aNameSpaceID || !aNodeValue || !aNumChildren ||
       !aUniqueID || !aNodeType)
     return E_INVALIDARG;
@@ -114,8 +108,6 @@ sdnAccessible::get_nodeInfo(BSTR __RPC_FAR* aNodeName,
   *aNumChildren = mNode->GetChildCount();
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -125,8 +117,6 @@ sdnAccessible::get_attributes(unsigned  short aMaxAttribs,
                               BSTR __RPC_FAR* aAttribValues,
                               unsigned short __RPC_FAR* aNumAttribs)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aAttribNames || !aNameSpaceIDs || !aAttribValues || !aNumAttribs)
     return E_INVALIDARG;
 
@@ -159,8 +149,6 @@ sdnAccessible::get_attributes(unsigned  short aMaxAttribs,
   }
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -169,8 +157,6 @@ sdnAccessible::get_attributesForNames(unsigned short aMaxAttribs,
                                       short __RPC_FAR* aNameSpaceID,
                                       BSTR __RPC_FAR* aAttribValues)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aAttribNames || !aNameSpaceID || !aAttribValues)
     return E_INVALIDARG;
 
@@ -207,8 +193,6 @@ sdnAccessible::get_attributesForNames(unsigned short aMaxAttribs,
   }
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -218,8 +202,6 @@ sdnAccessible::get_computedStyle(unsigned short aMaxStyleProperties,
                                  BSTR __RPC_FAR* aStyleValues,
                                  unsigned short __RPC_FAR* aNumStyleProperties)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aStyleProperties || aStyleValues || !aNumStyleProperties)
     return E_INVALIDARG;
 
@@ -257,8 +239,6 @@ sdnAccessible::get_computedStyle(unsigned short aMaxStyleProperties,
   *aNumStyleProperties = static_cast<unsigned short>(realIndex);
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -267,8 +247,6 @@ sdnAccessible::get_computedStyleForProperties(unsigned short aNumStyleProperties
                                               BSTR __RPC_FAR* aStyleProperties,
                                               BSTR __RPC_FAR* aStyleValues)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aStyleProperties || !aStyleValues)
     return E_INVALIDARG;
 
@@ -291,15 +269,11 @@ sdnAccessible::get_computedStyleForProperties(unsigned short aNumStyleProperties
   }
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 sdnAccessible::scrollTo(boolean aScrollTopLeft)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   DocAccessible* document = GetDocument();
   if (!document) // that's IsDefunct check
     return CO_E_OBJNOTCONNECTED;
@@ -313,15 +287,11 @@ sdnAccessible::scrollTo(boolean aScrollTopLeft)
 
   nsCoreUtils::ScrollTo(document->PresShell(), mNode->AsContent(), scrollType);
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 sdnAccessible::get_parentNode(ISimpleDOMNode __RPC_FAR *__RPC_FAR* aNode)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aNode)
     return E_INVALIDARG;
   *aNode = nullptr;
@@ -336,15 +306,11 @@ sdnAccessible::get_parentNode(ISimpleDOMNode __RPC_FAR *__RPC_FAR* aNode)
   }
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 sdnAccessible::get_firstChild(ISimpleDOMNode __RPC_FAR *__RPC_FAR* aNode)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aNode)
     return E_INVALIDARG;
   *aNode = nullptr;
@@ -359,15 +325,11 @@ sdnAccessible::get_firstChild(ISimpleDOMNode __RPC_FAR *__RPC_FAR* aNode)
   }
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 sdnAccessible::get_lastChild(ISimpleDOMNode __RPC_FAR *__RPC_FAR* aNode)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aNode)
     return E_INVALIDARG;
   *aNode = nullptr;
@@ -382,15 +344,11 @@ sdnAccessible::get_lastChild(ISimpleDOMNode __RPC_FAR *__RPC_FAR* aNode)
   }
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 sdnAccessible::get_previousSibling(ISimpleDOMNode __RPC_FAR *__RPC_FAR* aNode)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aNode)
     return E_INVALIDARG;
   *aNode = nullptr;
@@ -405,15 +363,11 @@ sdnAccessible::get_previousSibling(ISimpleDOMNode __RPC_FAR *__RPC_FAR* aNode)
   }
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 sdnAccessible::get_nextSibling(ISimpleDOMNode __RPC_FAR *__RPC_FAR* aNode)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aNode)
     return E_INVALIDARG;
   *aNode = nullptr;
@@ -428,16 +382,12 @@ sdnAccessible::get_nextSibling(ISimpleDOMNode __RPC_FAR *__RPC_FAR* aNode)
   }
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 sdnAccessible::get_childAt(unsigned aChildIndex,
                            ISimpleDOMNode __RPC_FAR *__RPC_FAR* aNode)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aNode)
     return E_INVALIDARG;
   *aNode = nullptr;
@@ -453,15 +403,11 @@ sdnAccessible::get_childAt(unsigned aChildIndex,
 
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 sdnAccessible::get_innerHTML(BSTR __RPC_FAR* aInnerHTML)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aInnerHTML)
     return E_INVALIDARG;
   *aInnerHTML = nullptr;
@@ -482,15 +428,11 @@ sdnAccessible::get_innerHTML(BSTR __RPC_FAR* aInnerHTML)
     return E_OUTOFMEMORY;
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 sdnAccessible::get_localInterface(void __RPC_FAR *__RPC_FAR* aLocalInterface)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aLocalInterface)
     return E_INVALIDARG;
   *aLocalInterface = nullptr;
@@ -502,15 +444,11 @@ sdnAccessible::get_localInterface(void __RPC_FAR *__RPC_FAR* aLocalInterface)
   AddRef();
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 sdnAccessible::get_language(BSTR __RPC_FAR* aLanguage)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aLanguage)
     return E_INVALIDARG;
   *aLanguage = nullptr;
@@ -534,6 +472,4 @@ sdnAccessible::get_language(BSTR __RPC_FAR* aLanguage)
    return E_OUTOFMEMORY;
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
diff --git a/accessible/windows/sdn/sdnDocAccessible.cpp b/accessible/windows/sdn/sdnDocAccessible.cpp
index 07b39e66f6..a1c5be872f 100644
--- a/accessible/windows/sdn/sdnDocAccessible.cpp
+++ b/accessible/windows/sdn/sdnDocAccessible.cpp
@@ -24,8 +24,6 @@ IMPL_IUNKNOWN_QUERY_TAIL_AGGREGATED(mAccessible)
 STDMETHODIMP
 sdnDocAccessible::get_URL(BSTR __RPC_FAR* aURL)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aURL)
     return E_INVALIDARG;
   *aURL = nullptr;
@@ -40,15 +38,11 @@ sdnDocAccessible::get_URL(BSTR __RPC_FAR* aURL)
 
   *aURL = ::SysAllocStringLen(URL.get(), URL.Length());
   return *aURL ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 sdnDocAccessible::get_title(BSTR __RPC_FAR* aTitle)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aTitle)
     return E_INVALIDARG;
   *aTitle = nullptr;
@@ -60,15 +54,11 @@ sdnDocAccessible::get_title(BSTR __RPC_FAR* aTitle)
   mAccessible->Title(title);
   *aTitle = ::SysAllocStringLen(title.get(), title.Length());
   return *aTitle ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 sdnDocAccessible::get_mimeType(BSTR __RPC_FAR* aMimeType)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aMimeType)
     return E_INVALIDARG;
   *aMimeType = nullptr;
@@ -83,15 +73,11 @@ sdnDocAccessible::get_mimeType(BSTR __RPC_FAR* aMimeType)
 
   *aMimeType = ::SysAllocStringLen(mimeType.get(), mimeType.Length());
   return *aMimeType ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 sdnDocAccessible::get_docType(BSTR __RPC_FAR* aDocType)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aDocType)
     return E_INVALIDARG;
   *aDocType = nullptr;
@@ -106,16 +92,12 @@ sdnDocAccessible::get_docType(BSTR __RPC_FAR* aDocType)
 
   *aDocType = ::SysAllocStringLen(docType.get(), docType.Length());
   return *aDocType ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 sdnDocAccessible::get_nameSpaceURIForID(short aNameSpaceID,
                                         BSTR __RPC_FAR* aNameSpaceURI)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aNameSpaceURI)
     return E_INVALIDARG;
   *aNameSpaceURI = nullptr;
@@ -138,20 +120,14 @@ sdnDocAccessible::get_nameSpaceURIForID(short aNameSpaceID,
                                        nameSpaceURI.Length());
 
   return *aNameSpaceURI ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 sdnDocAccessible::put_alternateViewMediaTypes(BSTR __RPC_FAR* aCommaSeparatedMediaTypes)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aCommaSeparatedMediaTypes)
     return E_INVALIDARG;
   *aCommaSeparatedMediaTypes = nullptr;
 
   return mAccessible->IsDefunct() ? CO_E_OBJNOTCONNECTED : E_NOTIMPL;
-
-  A11Y_TRYBLOCK_END
 }
diff --git a/accessible/windows/sdn/sdnTextAccessible.cpp b/accessible/windows/sdn/sdnTextAccessible.cpp
index b51caf44ed..b6f580ba33 100644
--- a/accessible/windows/sdn/sdnTextAccessible.cpp
+++ b/accessible/windows/sdn/sdnTextAccessible.cpp
@@ -33,8 +33,6 @@ IMPL_IUNKNOWN_QUERY_TAIL_AGGREGATED(mAccessible)
 STDMETHODIMP
 sdnTextAccessible::get_domText(BSTR __RPC_FAR* aText)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aText)
     return E_INVALIDARG;
   *aText = nullptr;
@@ -51,8 +49,6 @@ sdnTextAccessible::get_domText(BSTR __RPC_FAR* aText)
 
   *aText = ::SysAllocStringLen(nodeValue.get(), nodeValue.Length());
   return *aText ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -63,8 +59,6 @@ sdnTextAccessible::get_clippedSubstringBounds(unsigned int aStartIndex,
                                               int __RPC_FAR* aWidth,
                                               int __RPC_FAR* aHeight)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   nscoord x = 0, y = 0, width = 0, height = 0;
   HRESULT rv = get_unclippedSubstringBounds(aStartIndex, aEndIndex,
                                             &x, &y, &width, &height);
@@ -86,8 +80,6 @@ sdnTextAccessible::get_clippedSubstringBounds(unsigned int aStartIndex,
   *aWidth = clippedRect.width;
   *aHeight = clippedRect.height;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
@@ -98,8 +90,6 @@ sdnTextAccessible::get_unclippedSubstringBounds(unsigned int aStartIndex,
                                                 int __RPC_FAR* aWidth,
                                                 int __RPC_FAR* aHeight)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aX || !aY || !aWidth || !aHeight)
     return E_INVALIDARG;
   *aX = *aY = *aWidth = *aHeight = 0;
@@ -135,16 +125,12 @@ sdnTextAccessible::get_unclippedSubstringBounds(unsigned int aStartIndex,
   *aHeight = presContext->AppUnitsToDevPixels(sum.height);
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 sdnTextAccessible::scrollToSubstring(unsigned int aStartIndex,
                                      unsigned int aEndIndex)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (mAccessible->IsDefunct())
     return CO_E_OBJNOTCONNECTED;
 
@@ -159,15 +145,11 @@ sdnTextAccessible::scrollToSubstring(unsigned int aStartIndex,
     nsCoreUtils::ScrollSubstringTo(mAccessible->GetFrame(), range,
                                    nsIAccessibleScrollType::SCROLL_TYPE_ANYWHERE);
   return GetHRESULT(rv);
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 sdnTextAccessible::get_fontFamily(BSTR __RPC_FAR* aFontFamily)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aFontFamily)
     return E_INVALIDARG;
   *aFontFamily = nullptr;
@@ -189,8 +171,6 @@ sdnTextAccessible::get_fontFamily(BSTR __RPC_FAR* aFontFamily)
 
   *aFontFamily = ::SysAllocStringLen(name.get(), name.Length());
   return *aFontFamily ? S_OK : E_OUTOFMEMORY;
-
-  A11Y_TRYBLOCK_END
 }
 
 nsIFrame*
diff --git a/accessible/windows/uia/uiaRawElmProvider.cpp b/accessible/windows/uia/uiaRawElmProvider.cpp
index 54e54766de..3121661e15 100644
--- a/accessible/windows/uia/uiaRawElmProvider.cpp
+++ b/accessible/windows/uia/uiaRawElmProvider.cpp
@@ -28,24 +28,18 @@ STDMETHODIMP
 uiaRawElmProvider::GetObjectForChild(long aIdChild,
                                      __RPC__deref_out_opt IAccessibleEx** aAccEx)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aAccEx)
     return E_INVALIDARG;
 
   *aAccEx = nullptr;
 
   return mAcc->IsDefunct() ? CO_E_OBJNOTCONNECTED : S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 uiaRawElmProvider::GetIAccessiblePair(__RPC__deref_out_opt IAccessible** aAcc,
                                       __RPC__out long* aIdChild)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aAcc || !aIdChild)
     return E_INVALIDARG;
 
@@ -60,15 +54,11 @@ uiaRawElmProvider::GetIAccessiblePair(__RPC__deref_out_opt IAccessible** aAcc,
   mAcc->AddRef();
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 uiaRawElmProvider::GetRuntimeId(__RPC__deref_out_opt SAFEARRAY** aRuntimeIds)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aRuntimeIds)
     return E_INVALIDARG;
 
@@ -81,16 +71,12 @@ uiaRawElmProvider::GetRuntimeId(__RPC__deref_out_opt SAFEARRAY** aRuntimeIds)
     SafeArrayPutElement(*aRuntimeIds, &i, (void*)&(ids[i]));
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 uiaRawElmProvider::ConvertReturnedElement(__RPC__in_opt IRawElementProviderSimple* aRawElmProvider,
                                           __RPC__deref_out_opt IAccessibleEx** aAccEx)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aRawElmProvider || !aAccEx)
     return E_INVALIDARG;
 
@@ -102,8 +88,6 @@ uiaRawElmProvider::ConvertReturnedElement(__RPC__in_opt IRawElementProviderSimpl
     *aAccEx = static_cast<IAccessibleEx*>(instancePtr);
 
   return hr;
-
-  A11Y_TRYBLOCK_END
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -112,39 +96,29 @@ uiaRawElmProvider::ConvertReturnedElement(__RPC__in_opt IRawElementProviderSimpl
 STDMETHODIMP
 uiaRawElmProvider::get_ProviderOptions(__RPC__out enum ProviderOptions* aOptions)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aOptions)
     return E_INVALIDARG;
 
   // This method is not used with IAccessibleEx implementations.
   *aOptions = ProviderOptions_ServerSideProvider;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 uiaRawElmProvider::GetPatternProvider(PATTERNID aPatternId,
                                       __RPC__deref_out_opt IUnknown** aPatternProvider)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aPatternProvider)
     return E_INVALIDARG;
 
   *aPatternProvider = nullptr;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 uiaRawElmProvider::GetPropertyValue(PROPERTYID aPropertyId,
                                     __RPC__out VARIANT* aPropertyValue)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aPropertyValue)
     return E_INVALIDARG;
 
@@ -226,21 +200,15 @@ uiaRawElmProvider::GetPropertyValue(PROPERTYID aPropertyId,
   }
 
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }
 
 STDMETHODIMP
 uiaRawElmProvider::get_HostRawElementProvider(__RPC__deref_out_opt IRawElementProviderSimple** aRawElmProvider)
 {
-  A11Y_TRYBLOCK_BEGIN
-
   if (!aRawElmProvider)
     return E_INVALIDARG;
 
   // This method is not used with IAccessibleEx implementations.
   *aRawElmProvider = nullptr;
   return S_OK;
-
-  A11Y_TRYBLOCK_END
 }