Implement MojoAudioRendererSink and use it in UtilityMojoMediaClient

media/audio/audio_device_thread.h

Index: media/audio/audio_device_thread.h
diff --git a/media/audio/audio_device_thread.h b/media/audio/audio_device_thread.h
index f3287ef39ccf86705642dc5439f7b13860737f1d..10ce8027d64e5c635be14a9e66a22aff66b3d8a5 100644
--- a/media/audio/audio_device_thread.h
+++ b/media/audio/audio_device_thread.h
@@ -7,14 +7,19 @@
 
 #include <stdint.h>
 
+#include <memory>
+
 #include "base/macros.h"
 #include "base/memory/shared_memory.h"
 #include "base/sync_socket.h"
-#include "base/threading/platform_thread.h"
 #include "base/threading/thread_checker.h"
 #include "media/base/audio_parameters.h"
 #include "media/base/media_export.h"
 
+namespace base {
+class Thread;
+}
+
 namespace media {
 
 // Data transfer between browser and render process uses a combination
@@ -79,9 +84,8 @@ class MEDIA_EXPORT AudioDeviceThread : public base::PlatformThread::Delegate {
   void ThreadMain() final;
 
   Callback* const callback_;
-  const char* thread_name_;
   base::CancelableSyncSocket socket_;
-  base::PlatformThreadHandle thread_handle_;
+  std::unique_ptr<base::Thread> thread_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioDeviceThread);
 };