Switch Blink to using new Skia SkCanvas::drawPicture method

Source/platform/graphics/GraphicsContext.cpp

 /*
  * Copyright (C) 2003, 2004, 2005, 2006, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2013 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 525 matching lines @@
 
     if (contextDisabled() || displayList->bounds().isEmpty())
         return;
 
     realizeCanvasSave();
 
     const FloatRect& bounds = displayList->bounds();
     if (bounds.x() || bounds.y())
         m_canvas->translate(bounds.x(), bounds.y());
 
-    m_canvas->drawPicture(*displayList->picture());
+    m_canvas->drawPicture(displayList->picture());
 
     if (bounds.x() || bounds.y())
         m_canvas->translate(-bounds.x(), -bounds.y());
 }
 
 void GraphicsContext::setupPaintForFilling(SkPaint* paint) const
 {
     if (contextDisabled())
         return;
 
@@ skipping 1285 matching lines @@
 
 void GraphicsContext::didDrawTextInRect(const SkRect& textRect)
 {
     if (m_trackTextRegion) {
         TRACE_EVENT0("skia", "PlatformContextSkia::trackTextRegion");
         m_textRegion.join(textRect);
     }
 }
 
 }