Support error handling for Surface readbacks

content/browser/compositor/delegated_frame_host.h

 // Copyright 2014 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 CONTENT_BROWSER_COMPOSITOR_DELEGATED_FRAME_HOST_H_
 #define CONTENT_BROWSER_COMPOSITOR_DELEGATED_FRAME_HOST_H_
 
 #include "cc/layers/delegated_frame_provider.h"
 #include "cc/layers/delegated_frame_resource_collection.h"
 #include "cc/output/copy_output_result.h"
@@ skipping 165 matching lines @@
   void RunOnCommitCallbacks();
 
   // Add on compositing commit callback.
   void AddOnCommitCallbackAndDisableLocks(const base::Closure& callback);
 
   // Called after async thumbnailer task completes.  Scales and crops the result
   // of the copy.
   static void CopyFromCompositingSurfaceHasResult(
       const gfx::Size& dst_size_in_pixel,
       const SkColorType color_type,
-      const base::Callback<void(bool, const SkBitmap&)>& callback,
+      CopyFromCompositingSurfaceCallback& callback,
       scoped_ptr<cc::CopyOutputResult> result);
   static void PrepareTextureCopyOutputResult(
       const gfx::Size& dst_size_in_pixel,
       const SkColorType color_type,
-      const base::Callback<void(bool, const SkBitmap&)>& callback,
+      CopyFromCompositingSurfaceCallback& callback,
       scoped_ptr<cc::CopyOutputResult> result);
   static void PrepareBitmapCopyOutputResult(
       const gfx::Size& dst_size_in_pixel,
       const SkColorType color_type,
-      const base::Callback<void(bool, const SkBitmap&)>& callback,
+      CopyFromCompositingSurfaceCallback& callback,
       scoped_ptr<cc::CopyOutputResult> result);
   static void CopyFromCompositingSurfaceHasResultForVideo(
       base::WeakPtr<DelegatedFrameHost> rwhva,
       scoped_refptr<OwnedMailbox> subscriber_texture,
       scoped_refptr<media::VideoFrame> video_frame,
       const base::Callback<void(bool)>& callback,
       scoped_ptr<cc::CopyOutputResult> result);
   static void CopyFromCompositingSurfaceFinishedForVideo(
       base::WeakPtr<DelegatedFrameHost> rwhva,
       const base::Callback<void(bool)>& callback,
@@ skipping 99 matching lines @@
   // YUV readback pipeline.
   scoped_ptr<content::ReadbackYUVInterface>
       yuv_readback_pipeline_;
 
   scoped_ptr<DelegatedFrameEvictor> delegated_frame_evictor_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_COMPOSITOR_DELEGATED_FRAME_HOST_H_