Make 2D canvas smarter about chosing whether or not to use GPU acceleration

Source/core/editing/Editor.cpp

Index: Source/core/editing/Editor.cpp
diff --git a/Source/core/editing/Editor.cpp b/Source/core/editing/Editor.cpp
index c2b3ea246632a19ddb2ae67eb0399c769f6c6d83..f371fe0cfb6804d444f4bfed5df44de33818d26b 100644
--- a/Source/core/editing/Editor.cpp
+++ b/Source/core/editing/Editor.cpp
@@ -425,7 +425,7 @@ static PassRefPtr<Image> imageFromNode(const Node& node)
         return nullptr;
 
     if (layoutObject->isCanvas())
-        return toHTMLCanvasElement(node).copiedImage(FrontBuffer);
+        return toHTMLCanvasElement(node).copiedImage(FrontBuffer, PreferNoAcceleration);
 
     if (layoutObject->isImage()) {
         LayoutImage* layoutImage = toLayoutImage(layoutObject);