Migrate Graphics2D to new design.

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 "ppapi/c/pp_bool.h"
 #include "ppapi/c/ppb_image_data.h"
 
@@ skipping 24 matching lines @@
   // 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;
 
   // 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;
+
+  // Sets whether this image was used in a ReplaceContents call. If the
+  // current implementation supports image data recycling (only supported
+  // out-of-process then it will be marked for potential re-use.
+  virtual void SetUsedInReplaceContents() = 0;
 };
 
 }  // namespace thunk
 }  // namespace ppapi
 
 #endif  // PPAPI_THUNK_PPB_IMAGE_DATA_API_H_