Make ui::Snapshot asynchronous on Android, remove CompositeAndReadback.

cc/output/copy_output_result.h

 // Copyright 2013 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 CC_OUTPUT_COPY_OUTPUT_RESULT_H_
 #define CC_OUTPUT_COPY_OUTPUT_RESULT_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "cc/base/cc_export.h"
+#include "cc/resources/single_release_callback.h"
 #include "cc/resources/texture_mailbox.h"
 #include "ui/gfx/size.h"
 
 class SkBitmap;
 
 namespace cc {
-class SingleReleaseCallback;
 class TextureMailbox;
 
 class CC_EXPORT CopyOutputResult {
  public:
   static scoped_ptr<CopyOutputResult> CreateEmptyResult() {
     return make_scoped_ptr(new CopyOutputResult);
   }
   static scoped_ptr<CopyOutputResult> CreateBitmapResult(
       scoped_ptr<SkBitmap> bitmap) {
     return make_scoped_ptr(new CopyOutputResult(bitmap.Pass()));
@@ skipping 26 matching lines @@
 
   gfx::Size size_;
   scoped_ptr<SkBitmap> bitmap_;
   TextureMailbox texture_mailbox_;
   scoped_ptr<SingleReleaseCallback> release_callback_;
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_COPY_OUTPUT_RESULT_H_