Move the "platform" wrappers in skia/ext to the skia namespace.

webkit/port/platform/graphics/chromium/ImageBufferData.h

 /*
  * Copyright (C) 2008 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 25 matching lines @@
 #include "PlatformContextSkia.h"
 
 #include "skia/ext/platform_canvas.h"
 
 namespace WebCore {
 
 class ImageBufferData {
 public:
     ImageBufferData(const IntSize&);
 
-    gfx::PlatformCanvas m_canvas;
+    skia::PlatformCanvas m_canvas;
 
     // Must be second since this will refer to m_canvas.
     PlatformContextSkia m_platformContext;
 };
 
 }  // namespace WebCore
 
 #endif
 
 #endif  // ImageBufferData_h