Improve origin-clean algorithm

1 files changed, 5 insertions, 3 deletions

diff --git a/layout/base/nsLayoutUtils.cpp b/layout/base/nsLayoutUtils.cpp
index 07befdc812..17ece8e61c 100644
--- a/layout/base/nsLayoutUtils.cpp
+++ b/layout/base/nsLayoutUtils.cpp
@@ -8,6 +8,7 @@
 
 #include "mozilla/ArrayUtils.h"
 #include "mozilla/BasicEvents.h"
+#include "mozilla/dom/CanvasUtils.h"
 #include "mozilla/ClearOnShutdown.h"
 #include "mozilla/EffectCompositor.h"
 #include "mozilla/EffectSet.h"
@@ -7285,10 +7286,10 @@ nsLayoutUtils::SurfaceFromElement(nsIImageLoadingContent* aElement,
   }
 
   result.mPrincipal = principal.forget();
-  // no images, including SVG images, can load content from another domain.
-  result.mIsWriteOnly = false;
   result.mImageRequest = imgRequest.forget();
   return result;
+  result.mIsWriteOnly =
+      CanvasUtils::CheckWriteOnlySecurity(result.mCORSUsed, result.mPrincipal);  
 }
 
 nsLayoutUtils::SurfaceFromElementResult
@@ -7400,7 +7401,8 @@ nsLayoutUtils::SurfaceFromElement(HTMLVideoElement* aElement,
   result.mHasSize = true;
   result.mSize = result.mLayersImage->GetSize();
   result.mPrincipal = principal.forget();
-  result.mIsWriteOnly = false;
+  result.mIsWriteOnly =
+      CanvasUtils::CheckWriteOnlySecurity(result.mCORSUsed, result.mPrincipal);
 
   return result;
 }