1 files changed, 8 insertions, 0 deletions
diff --git a/dom/base/nsIDocument.h b/dom/base/nsIDocument.h
index 3088736bd2..297a207fcb 100644
--- a/dom/base/nsIDocument.h
+++ b/dom/base/nsIDocument.h
@@ -2885,6 +2885,11 @@ public:
     --mThrowOnDynamicMarkupInsertionCounter;
   }
 
+  bool IsWebComponentsEnabled() const
+  {
+    return mIsWebComponentsEnabled;
+  }
+
 protected:
   bool GetUseCounter(mozilla::UseCounter aUseCounter)
   {
@@ -3028,6 +3033,9 @@ protected:
   // container for per-context fonts (downloadable, SVG, etc.)
   RefPtr<mozilla::dom::FontFaceSet> mFontFaceSet;
 
+  // True if dom.webcomponents.enabled pref is set when document is created.
+  bool mIsWebComponentsEnabled : 1;
+
   // Compatibility mode
   nsCompatibility mCompatMode;