Initialization of audio manager for Android is now done on the audio thread

media/audio/android/audio_manager_android.h

Index: media/audio/android/audio_manager_android.h
diff --git a/media/audio/android/audio_manager_android.h b/media/audio/android/audio_manager_android.h
index b65e5934cf59cce1b18869c70eddb96e3fe7e92e..ee5ad28e36e46e33e069554301f671fe178d8847 100644
--- a/media/audio/android/audio_manager_android.h
+++ b/media/audio/android/audio_manager_android.h
@@ -10,6 +10,7 @@
 #include "base/android/jni_android.h"
 #include "base/gtest_prod_util.h"
 #include "base/synchronization/lock.h"
+#include "base/synchronization/waitable_event.h"
 #include "media/audio/audio_manager_base.h"
 
 namespace media {
@@ -65,9 +66,10 @@ class MEDIA_EXPORT AudioManagerAndroid : public AudioManagerBase {
       const AudioParameters& input_params) OVERRIDE;
 
  private:
+  void InitializeOnAudioThread();
+  void ShutdownOnAudioThread();
+
   bool HasNoAudioInputStreams();
-  void Init();
-  void Close();
   void SetCommunicationAudioModeOn(bool on);
   bool SetAudioDevice(const std::string& device_id);
   int GetNativeOutputSampleRate();
@@ -77,18 +79,11 @@ class MEDIA_EXPORT AudioManagerAndroid : public AudioManagerBase {
 
   void DoSetMuteOnAudioThread(bool muted);
 
-  // Allow the AudioAndroidTest to access private methods.
-  FRIEND_TEST_ALL_PREFIXES(AudioAndroidOutputTest, IsAudioLowLatencySupported);
-
   // Java AudioManager instance.
   base::android::ScopedJavaGlobalRef<jobject> j_audio_manager_;
 
   typedef std::set<OpenSLESOutputStream*> OutputStreams;
   OutputStreams streams_;
-  // TODO(wjia): remove this lock once unit test modules are fixed to call
-  // AudioManager::MakeAudioOutputStream on the audio thread. For now, this
-  // lock is used to guard access to |streams_|.
-  base::Lock streams_lock_;
 
   // Enabled when first input stream is created and set to false when last
   // input stream is destroyed. Also affects the stream type of output streams.