Replace MessageLoopProxy with SingleThreadTaskRunner for the rest of media/.

chrome/browser/extensions/api/webrtc_audio_private/webrtc_audio_private_api.h

 // Copyright 2013 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_API_WEBRTC_AUDIO_PRIVATE_WEBRTC_AUDIO_PRIVATE_API_H_
 #define CHROME_BROWSER_EXTENSIONS_API_WEBRTC_AUDIO_PRIVATE_WEBRTC_AUDIO_PRIVATE_API_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/system_monitor/system_monitor.h"
 #include "chrome/browser/extensions/api/profile_keyed_api_factory.h"
 #include "chrome/browser/extensions/chrome_extension_function.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/common/extensions/api/webrtc_audio_private.h"
 #include "content/public/browser/render_view_host.h"
 #include "media/audio/audio_device_name.h"
 #include "url/gurl.h"
 
 namespace base {
-class MessageLoopProxy;
+class SingleThreadTaskRunner;
 }
 
 namespace extensions {
 
 // Listens for device changes and forwards as an extension event.
 class WebrtcAudioPrivateEventService
     : public ProfileKeyedAPI,
       public base::SystemMonitor::DevicesChangedObserver {
  public:
   explicit WebrtcAudioPrivateEventService(Profile* profile);
@@ skipping 70 matching lines @@
   DECLARE_EXTENSION_FUNCTION("webrtcAudioPrivate.setActiveSink",
                              WEBRTC_AUDIO_PRIVATE_SET_ACTIVE_SINK);
 
   virtual bool RunImpl() OVERRIDE;
   virtual void OnControllerList(
       const content::RenderViewHost::AudioOutputControllerList&
       controllers) OVERRIDE;
   void SwitchDone();
   void DoneOnUIThread();
 
-  // Message loop of the thread this class is constructed on.
-  const scoped_refptr<base::MessageLoopProxy> message_loop_;
+  // Task runner of the thread this class is constructed on.
+  const scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
   int tab_id_;
   std::string sink_id_;
 
   // Number of sink IDs we are still waiting for. Can become greater
   // than 0 in OnControllerList, decreases on every OnSinkId call.
   size_t num_remaining_sink_ids_;
 };
 
 class WebrtcAudioPrivateGetAssociatedSinkFunction
@@ skipping 45 matching lines @@
   // time, no locking needed.
   scoped_ptr<api::webrtc_audio_private::GetAssociatedSink::Params> params_;
 
   // Filled in by DoWorkOnDeviceThread.
   media::AudioDeviceNames source_devices_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_API_WEBRTC_AUDIO_PRIVATE_WEBRTC_AUDIO_PRIVATE_API_H_