Re-land: Make 2D canvas smarter about chosing whether or not to use GPU acceleration

third_party/WebKit/Source/core/editing/Editor.cpp

Index: third_party/WebKit/Source/core/editing/Editor.cpp
diff --git a/third_party/WebKit/Source/core/editing/Editor.cpp b/third_party/WebKit/Source/core/editing/Editor.cpp
index 9008243b2466db15dfacd376d1c0872b05acecc4..fbaff7853a9a65c273f77f4c55557c8e97861083 100644
--- a/third_party/WebKit/Source/core/editing/Editor.cpp
+++ b/third_party/WebKit/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);