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

content/common/gpu/media/v4l2_video_decode_accelerator.cc

 // 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.
 
 #include <dlfcn.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <linux/videodev2.h>
 #include <poll.h>
 #include <string.h>
@@ skipping 400 matching lines @@
   }
 #endif
 
   scoped_ptr<EGLSyncKHRRef> egl_sync_ref(new EGLSyncKHRRef(
       egl_display_, egl_sync));
   decoder_thread_.message_loop()->PostTask(FROM_HERE, base::Bind(
       &V4L2VideoDecodeAccelerator::ReusePictureBufferTask,
       base::Unretained(this), picture_buffer_id, base::Passed(&egl_sync_ref)));
 }
 
-void V4L2VideoDecodeAccelerator::Flush() {
+void V4L2VideoDecodeAccelerator::Flush(bool return_buffers) {
   DVLOG(3) << "Flush()";
   DCHECK(child_task_runner_->BelongsToCurrentThread());
   decoder_thread_.message_loop()->PostTask(FROM_HERE, base::Bind(
       &V4L2VideoDecodeAccelerator::FlushTask, base::Unretained(this)));
 }
 
 void V4L2VideoDecodeAccelerator::Reset() {
   DVLOG(3) << "Reset()";
   DCHECK(child_task_runner_->BelongsToCurrentThread());
   decoder_thread_.message_loop()->PostTask(FROM_HERE, base::Bind(
@@ skipping 1595 matching lines @@
 
 void V4L2VideoDecodeAccelerator::PictureCleared() {
   DVLOG(3) << "PictureCleared(). clearing count=" << picture_clearing_count_;
   DCHECK_EQ(decoder_thread_.message_loop(), base::MessageLoop::current());
   DCHECK_GT(picture_clearing_count_, 0);
   picture_clearing_count_--;
   SendPictureReady();
 }
 
 }  // namespace content