Add fixed raster scale use counter histograms.

third_party/WebKit/public/web/WebWidget.h

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 225 matching lines @@
     virtual WebColor backgroundColor() const { return 0xFFFFFFFF; /* SK_ColorWHITE */ }
 
     // The currently open page popup, which are calendar and datalist pickers
     // but not the select popup.
     virtual WebPagePopup* pagePopup() const { return 0; }
 
     // Updates top controls constraints and current state. Allows embedder to
     // control what are valid states for top controls and if it should animate.
     virtual void updateTopControlsState(WebTopControlsState constraints, WebTopControlsState current, bool animate) { }
 
+    // Report that the last frame had a fixed raster scale with blurry content
+    // or potential performance issues.
+    virtual void reportFixedRasterScaleUseCounters(bool hasBlurryContent, bool hasPotentialPerformanceRegression) {}
+
 protected:
     ~WebWidget() { }
 };
 
 } // namespace blink
 
 #endif