Fix playback rate w/o audio. Remove unused SetPlaybackRate().

content/renderer/media/render_audiosourceprovider.cc

 // 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.
 
 #include "content/renderer/media/render_audiosourceprovider.h"
 
 #include "base/basictypes.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "content/public/common/content_switches.h"
@@ skipping 97 matching lines @@
   is_running_ = true;
 }
 
 void RenderAudioSourceProvider::Pause(bool flush) {
   base::AutoLock auto_lock(sink_lock_);
   if (!client_)
     default_sink_->Pause(flush);
   is_running_ = false;
 }
 
-void RenderAudioSourceProvider::SetPlaybackRate(float rate) {
-  base::AutoLock auto_lock(sink_lock_);
-  if (!client_)
-    default_sink_->SetPlaybackRate(rate);
-}
-
 bool RenderAudioSourceProvider::SetVolume(double volume) {
   base::AutoLock auto_lock(sink_lock_);
   if (!client_)
     default_sink_->SetVolume(volume);
   return true;
 }
 
 void RenderAudioSourceProvider::Initialize(
     const media::AudioParameters& params,
     RenderCallback* renderer) {
   base::AutoLock auto_lock(sink_lock_);
   CHECK(!is_initialized_);
   renderer_ = renderer;
 
   default_sink_->Initialize(params, renderer);
 
   // Keep track of the format in case the client hasn't yet been set.
   channels_ = params.channels();
   sample_rate_ = params.sample_rate();
 
   if (client_) {
     // Inform WebKit about the audio stream format.
     client_->setFormat(channels_, sample_rate_);
   }
 
   is_initialized_ = true;
 }
 
 RenderAudioSourceProvider::~RenderAudioSourceProvider() {}