Add fixed raster scale use counter histograms.

third_party/WebKit/Source/platform/graphics/GraphicsLayer.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 146 matching lines @@
     ASSERT(!m_parent);
 }
 
 LayoutRect GraphicsLayer::visualRect() const
 {
     LayoutRect bounds = LayoutRect(FloatPoint(), size());
     bounds.move(offsetFromLayoutObjectWithSubpixelAccumulation());
     return bounds;
 }
 
+void GraphicsLayer::setHasWillChangeTransformHint(bool hasWillChangeTransform)
+{
+    m_layer->layer()->setHasWillChangeTransformHint(hasWillChangeTransform);
+}
+
 void GraphicsLayer::setDrawDebugRedFillForTesting(bool enabled)
 {
     s_drawDebugRedFill = enabled;
 }
 
 void GraphicsLayer::setParent(GraphicsLayer* layer)
 {
     ASSERT(!layer || !layer->hasAncestor(this));
     m_parent = layer;
 }
@@ skipping 1046 matching lines @@
 {
     if (!layer) {
         fprintf(stderr, "Cannot showGraphicsLayerTree for (nil).\n");
         return;
     }
 
     String output = layer->layerTreeAsText(blink::LayerTreeIncludesDebugInfo);
     fprintf(stderr, "%s\n", output.utf8().data());
 }
 #endif