Refactor the PlatformContext layer to have only one class.

skia/ext/vector_canvas.h

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SKIA_EXT_VECTOR_CANVAS_H_
 #define SKIA_EXT_VECTOR_CANVAS_H_
 
-#include "skia/ext/platform_canvas_win.h"
-#include "skia/ext/vector_device.h"
+#include "skia/ext/platform_canvas.h"
+#include "skia/ext/vector_platform_device_win.h"
 
 namespace skia {
 
 // This class is a specialization of the regular PlatformCanvas. It is designed
 // to work with a VectorDevice to manage platform-specific drawing. It allows
 // using both Skia operations and platform-specific operations. It *doesn't*
 // support reading back from the bitmap backstore since it is not used.
-class VectorCanvas : public PlatformCanvasWin {
+class VectorCanvas : public PlatformCanvas {
  public:
   VectorCanvas();
   VectorCanvas(HDC dc, int width, int height);
   virtual ~VectorCanvas();
 
   // For two-part init, call if you use the no-argument constructor above
   bool initialize(HDC context, int width, int height);
 
   virtual SkBounder* setBounder(SkBounder*);
   virtual SkDevice* createDevice(SkBitmap::Config config,
@@ skipping 11 matching lines @@
 
   // Copy & assign are not supported.
   VectorCanvas(const VectorCanvas&);
   const VectorCanvas& operator=(const VectorCanvas&);
 };
 
 }  // namespace skia
 
 #endif  // SKIA_EXT_VECTOR_CANVAS_H_