cc: Make PaintCanvas abstract

third_party/WebKit/Source/platform/graphics/Canvas2DLayerBridge.cpp

 /*
  * Copyright (C) 2012 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:
  *
  * 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
@@ skipping 551 matching lines @@
     wantAcceleration = false;
     m_softwareRenderingWhileHidden = true;
   }
 
   bool surfaceIsAccelerated;
   m_surface = createSkSurface(
       wantAcceleration ? m_contextProvider->grContext() : nullptr, m_size,
       m_msaaSampleCount, m_opacityMode, skSurfaceColorSpace(), m_colorType,
       &surfaceIsAccelerated);
   m_surfacePaintCanvas =
-      WTF::wrapUnique(new PaintCanvas(m_surface->getCanvas()));
+      WTF::wrapUnique(new SkiaPaintCanvas(m_surface->getCanvas()));
 
   if (m_surface) {
     // Always save an initial frame, to support resetting the top level matrix
     // and clip.
     m_surfacePaintCanvas->save();
   } else {
     reportSurfaceCreationFailure();
   }
 
   if (m_surface && surfaceIsAccelerated && !m_layer) {
@@ skipping 533 matching lines @@
     default;
 
 void Canvas2DLayerBridge::Logger::reportHibernationEvent(
     HibernationEvent event) {
   DEFINE_STATIC_LOCAL(EnumerationHistogram, hibernationHistogram,
                       ("Canvas.HibernationEvents", HibernationEventCount));
   hibernationHistogram.count(event);
 }
 
 }  // namespace blink