[NOT FOR COMMIT] Fully replace SkCanvas uses.

ppapi/thunk/ppb_image_data_api.h

 // Copyright (c) 2012 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 PPAPI_THUNK_PPB_IMAGE_DATA_API_H_
 #define PPAPI_THUNK_PPB_IMAGE_DATA_API_H_
 
 #include <stdint.h>
 
 #include "ppapi/c/pp_bool.h"
 #include "ppapi/c/ppb_image_data.h"
-
-class SkCanvas;
+#include "skia/ext/cdl_common.h"
 
 namespace base {
 class SharedMemory;
 }  // namespace base
 
 namespace ppapi {
 namespace thunk {
 
 class PPB_ImageData_API {
  public:
@@ skipping 11 matching lines @@
   // one.
   // The canvas will be NULL:
   //   * If the image is not mapped.
   //   * Within untrusted code (which does not have skia).
   //   * If the ImageData is not backed by a platform-specific image buffer.
   //     This will be the case for ImageDatas created for use in NaCl.
   // For this last reason, you should prefer GetCanvas any time you don't need
   // a platform-specific canvas (e.g., for use with platform-specific APIs).
   // Anything that relies on having a PlatformCanvas will not work for ImageDat
   // objects created from NaCl.
-  virtual SkCanvas* GetPlatformCanvas() = 0;
+  virtual CdlCanvas* GetPlatformCanvas() = 0;
 
   // Get the canvas that backs this ImageData, if there is one.
   // The canvas will be NULL:
   //   * If the image is not mapped.
   //   * Within untrusted code (which does not have skia).
-  virtual SkCanvas* GetCanvas() = 0;
+  virtual CdlCanvas* GetCanvas() = 0;
 
   // Signal that this image is a good candidate for reuse. Call this from APIs
   // that receive ImageData resources of a fixed size and where the plugin will
   // release its reference to the ImageData. If the current implementation
   // supports image data reuse (only supported out-of-process) then the
   // ImageData will be marked and potentially cached for re-use.
   virtual void SetIsCandidateForReuse() = 0;
 };
 
 }  // namespace thunk
 }  // namespace ppapi
 
 #endif  // PPAPI_THUNK_PPB_IMAGE_DATA_API_H_