Improve metrics for display list canvas fallback reason

third_party/WebKit/Source/core/html/HTMLImageElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 849 matching lines @@
 
 bool HTMLImageElement::isOpaque() const {
   Image* image = const_cast<HTMLImageElement*>(this)->imageContents();
   return image && image->currentFrameKnownToBeOpaque();
 }
 
 int HTMLImageElement::sourceWidth() {
   SourceImageStatus status;
   FloatSize defaultObjectSize(width(), height());
   RefPtr<Image> image = getSourceImageForCanvas(
-      &status, PreferNoAcceleration, SnapshotReasonCopyToWebGLTexture,
-      defaultObjectSize);
+      &status, PreferNoAcceleration, SnapshotReasonUnknown, defaultObjectSize);
   return image->width();
 }
 
 int HTMLImageElement::sourceHeight() {
   SourceImageStatus status;
   FloatSize defaultObjectSize(width(), height());
   RefPtr<Image> image = getSourceImageForCanvas(
-      &status, PreferNoAcceleration, SnapshotReasonCopyToWebGLTexture,
-      defaultObjectSize);
+      &status, PreferNoAcceleration, SnapshotReasonUnknown, defaultObjectSize);
   return image->height();
 }
 
 IntSize HTMLImageElement::bitmapSourceSize() const {
   ImageResource* image = cachedImage();
   if (!image)
     return IntSize();
   LayoutSize lSize = image->imageSize(
       LayoutObject::shouldRespectImageOrientation(layoutObject()), 1.0f);
   DCHECK(lSize.fraction().isZero());
   return IntSize(lSize.width().toInt(), lSize.height().toInt());
 }
 
 }  // namespace blink