Set state of a new audio stream to paused until it starts playing.

chrome/renderer/media/audio_renderer_impl.cc

 // Copyright (c) 2010 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 "chrome/renderer/media/audio_renderer_impl.h"
 
 #include <math.h>
 
 #include "chrome/common/render_messages.h"
 #include "chrome/renderer/audio_message_filter.h"
@@ skipping 147 matching lines @@
       NewRunnableMethod(this, &AudioRendererImpl::SeekTask));
 }
 
 
 void AudioRendererImpl::Play(media::FilterCallback* callback) {
   AudioRendererBase::Play(callback);
   AutoLock auto_lock(lock_);
   if (stopped_)
     return;
 
-  io_loop_->PostTask(FROM_HERE,
-      NewRunnableMethod(this, &AudioRendererImpl::PlayTask));
+  if (GetPlaybackRate() != 0.0f) {
+    io_loop_->PostTask(FROM_HERE,
+                       NewRunnableMethod(this, &AudioRendererImpl::PlayTask));
+  } else {
+    io_loop_->PostTask(FROM_HERE,
+                       NewRunnableMethod(this, &AudioRendererImpl::PauseTask));
+  }
 }
 
 void AudioRendererImpl::SetVolume(float volume) {
   AutoLock auto_lock(lock_);
   if (stopped_)
     return;
   io_loop_->PostTask(FROM_HERE,
       NewRunnableMethod(
           this, &AudioRendererImpl::SetVolumeTask, volume));
 }
@@ skipping 181 matching lines @@
   DCHECK(MessageLoop::current() == io_loop_);
 
   // We treat the IO loop going away the same as stopping.
   AutoLock auto_lock(lock_);
   if (stopped_)
     return;
 
   stopped_ = true;
   DestroyTask();
 }