Add an additional VDA::Flush() mode to return all allocated buffers.

content/common/gpu/client/gpu_video_decode_accelerator_host.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 CONTENT_COMMON_GPU_CLIENT_GPU_VIDEO_DECODE_ACCELERATOR_HOST_H_
 #define CONTENT_COMMON_GPU_CLIENT_GPU_VIDEO_DECODE_ACCELERATOR_HOST_H_
 
 #include <stdint.h>
 
 #include <vector>
@@ skipping 26 matching lines @@
   void OnChannelError() override;
   bool OnMessageReceived(const IPC::Message& message) override;
 
   // media::VideoDecodeAccelerator implementation.
   bool Initialize(const Config& config, Client* client) override;
   void SetCdm(int cdm_id) override;
   void Decode(const media::BitstreamBuffer& bitstream_buffer) override;
   void AssignPictureBuffers(
       const std::vector<media::PictureBuffer>& buffers) override;
   void ReusePictureBuffer(int32_t picture_buffer_id) override;
-  void Flush() override;
+  void Flush(bool return_buffers) override;
   void Reset() override;
   void Destroy() override;
 
   // CommandBufferProxyImpl::DeletionObserver implemetnation.
   void OnWillDeleteImpl() override;
 
  private:
   // Only Destroy() should be deleting |this|.
   ~GpuVideoDecodeAcceleratorHost() override;
 
@@ skipping 40 matching lines @@
 
   // WeakPtr factory for posting tasks back to itself.
   base::WeakPtrFactory<GpuVideoDecodeAcceleratorHost> weak_this_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuVideoDecodeAcceleratorHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_CLIENT_GPU_VIDEO_DECODE_ACCELERATOR_HOST_H_