Pause for <video> should have immediate effect on audio

chrome/browser/renderer_host/audio_renderer_host.cc

 // Copyright (c) 2009 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 "base/histogram.h"
 #include "base/lock.h"
 #include "base/message_loop.h"
 #include "base/process.h"
 #include "base/shared_memory.h"
 #include "base/waitable_event.h"
@@ skipping 133 matching lines @@
 }
 
 void AudioRendererHost::IPCAudioSource::Play() {
   // We can start from created or paused state.
   if (!stream_ || (state_ != kCreated && state_ != kPaused))
     return;
 
   stream_->Start(this);
 
   // Update the state and notify renderer.
-  state_ = kPaused;
+  state_ = kPlaying;
 
   ViewMsg_AudioStreamState state;
   state.state = ViewMsg_AudioStreamState::kPlaying;
   host_->Send(new ViewMsg_NotifyAudioStreamStateChanged(
       route_id_, stream_id_, state));
 }
 
 void AudioRendererHost::IPCAudioSource::Pause() {
   // We can pause from started state.
   if (!stream_ || state_ != kPlaying)
@@ skipping 383 matching lines @@
   if (MessageLoop::current() == io_loop_) {
     OnDestroySource(source);
   } else {
     // TODO(hclam): make sure it's always safe to post a task to IO loop.
     // It is possible that IO message loop is destroyed but there's still some
     // dangling audio hardware threads that try to call this method.
     io_loop_->PostTask(FROM_HERE,
       NewRunnableMethod(this, &AudioRendererHost::OnDestroySource, source));
   }
 }