Change audio render thread checking to use new AudioRendererSink::BelongsToRendererThread()

media/audio/audio_output_device.h

 // 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.
 //
 // Audio rendering unit utilizing audio output stream provided by browser
 // process through IPC.
 //
 // Relationship of classes.
 //
 //  AudioOutputController                AudioOutputDevice
@@ skipping 91 matching lines @@
 
   // AudioRendererSink implementation.
   void Initialize(const AudioParameters& params,
                   RenderCallback* callback) override;
   void Start() override;
   void Stop() override;
   void Play() override;
   void Pause() override;
   bool SetVolume(double volume) override;
   OutputDeviceInfo GetOutputDeviceInfo() override;
+  bool CurrentThreadIsRenderingThread() override;
 
   // Methods called on IO thread ----------------------------------------------
   // AudioOutputIPCDelegate methods.
   void OnStateChanged(AudioOutputIPCDelegateState state) override;
   void OnDeviceAuthorized(OutputDeviceStatus device_status,
                           const media::AudioParameters& output_params,
                           const std::string& matched_device_id) override;
   void OnStreamCreated(base::SharedMemoryHandle handle,
                        base::SyncSocket::Handle socket_handle,
                        int length) override;
@@ skipping 93 matching lines @@
 
   const base::TimeDelta auth_timeout_;
   std::unique_ptr<base::OneShotTimer> auth_timeout_action_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioOutputDevice);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_AUDIO_AUDIO_OUTPUT_DEVICE_H_