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

media/audio/audio_device_thread.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.
 
 #ifndef MEDIA_AUDIO_AUDIO_DEVICE_THREAD_H_
 #define MEDIA_AUDIO_AUDIO_DEVICE_THREAD_H_
 
 #include <stdint.h>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/shared_memory.h"
 #include "base/sync_socket.h"
 #include "base/synchronization/lock.h"
+#include "base/threading/thread_checker.h"
 #include "media/base/audio_parameters.h"
 #include "media/base/media_export.h"
 
 namespace base {
 class MessageLoop;
 }
 
 namespace media {
 class AudioBus;
 
@@ skipping 36 matching lines @@
     const AudioParameters audio_parameters_;
     const double samples_per_ms_;
     const double bytes_per_ms_;
     const uint32_t bytes_per_frame_;
 
     base::SharedMemory shared_memory_;
     const int memory_length_;
     const int total_segments_;
     int segment_length_;
 
+    // Detached in constructor and attached in InitializeOnAudioThread() which
+    // is called on the audio device thread. Sub-classes can then use it for
+    // various thread checking purposes.
+    base::ThreadChecker thread_checker_;
+
    private:
     DISALLOW_COPY_AND_ASSIGN(Callback);
   };
 
   AudioDeviceThread();
   ~AudioDeviceThread();
 
   // Starts the audio thread. The thread must not already be running.  If
   // |sychronized_buffers| is set, the browser expects to be notified via the
   // |socket| every time AudioDeviceThread::Process() completes.
@@ skipping 28 matching lines @@
 
   base::Lock thread_lock_;
   scoped_refptr<AudioDeviceThread::Thread> thread_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioDeviceThread);
 };
 
 }  // namespace media.
 
 #endif  // MEDIA_AUDIO_AUDIO_DEVICE_THREAD_H_