Enable fire-and-forget Destroy of HW video decoder, and misc other improvements.

content/renderer/pepper_platform_video_decoder_impl.cc

 // Copyright (c) 2011 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 "content/renderer/pepper_platform_video_decoder_impl.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "content/common/child_process.h"
 #include "content/renderer/gpu/gpu_channel_host.h"
 #include "content/renderer/render_thread.h"
 
 using media::BitstreamBuffer;
 
 PlatformVideoDecoderImpl::PlatformVideoDecoderImpl(
     VideoDecodeAccelerator::Client* client,
     int32 command_buffer_route_id,
     gpu::CommandBufferHelper* cmd_buffer_helper)
     : client_(client),
       command_buffer_route_id_(command_buffer_route_id),
-      cmd_buffer_helper_(cmd_buffer_helper),
-      decoder_(NULL) {
+      cmd_buffer_helper_(cmd_buffer_helper) {
   DCHECK(client);
 }
 
 PlatformVideoDecoderImpl::~PlatformVideoDecoderImpl() {}
 
 bool PlatformVideoDecoderImpl::Initialize(const std::vector<uint32>& configs) {
   // TODO(vrk): Support multiple decoders.
   if (decoder_)
     return true;
 
@@ skipping 91 matching lines @@
 
 void PlatformVideoDecoderImpl::NotifyFlushDone() {
   DCHECK_EQ(RenderThread::current()->message_loop(), MessageLoop::current());
   client_->NotifyFlushDone();
 }
 
 void PlatformVideoDecoderImpl::NotifyResetDone() {
   DCHECK_EQ(RenderThread::current()->message_loop(), MessageLoop::current());
   client_->NotifyResetDone();
 }
-
-void PlatformVideoDecoderImpl::NotifyDestroyDone() {
-  DCHECK_EQ(RenderThread::current()->message_loop(), MessageLoop::current());
-  client_->NotifyDestroyDone();
-}