Clean up the media stream audio track code

content/browser/renderer_host/render_process_host_impl.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.
 
 // Represents the browser side of the browser <--> renderer communication
 // channel. There will be one RenderProcessHost per renderer process.
 
 #include "content/browser/renderer_host/render_process_host_impl.h"
 
 #include <algorithm>
@@ skipping 1210 matching lines @@
     cc::switches::kSlowDownRasterScaleFactor,
     cc::switches::kStrictLayerPropertyChangeChecking,
     cc::switches::kTopControlsHeight,
     cc::switches::kTopControlsHideThreshold,
     cc::switches::kTopControlsShowThreshold,
 #if defined(ENABLE_PLUGINS)
     switches::kEnablePepperTesting,
     switches::kEnablePluginPowerSaver,
 #endif
 #if defined(ENABLE_WEBRTC)
-    switches::kDisableAudioTrackProcessing,
     switches::kDisableWebRtcHWDecoding,
     switches::kDisableWebRtcHWEncoding,
     switches::kEnableWebRtcHWVp8Encoding,
     switches::kEnableWebRtcHWH264Encoding,
 #endif
     switches::kLowEndDeviceMode,
 #if defined(OS_ANDROID)
     switches::kDisableGestureRequirementForMediaPlayback,
     switches::kDisableWebRTC,
     switches::kEnableSpeechRecognition,
@@ skipping 1003 matching lines @@
 
 void RenderProcessHostImpl::DecrementWorkerRefCount() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   DCHECK_GT(worker_ref_count_, 0);
   --worker_ref_count_;
   if (worker_ref_count_ == 0)
     Cleanup();
 }
 
 }  // namespace content