Intiialize AudioManager and related class lazily

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 8849f3790f93fe1c64d44f3d5b4dbb562e1363a7..ec38dcc6e895989cb942065e8c5d7eaa4452a98c 100644
--- a/media/audio/android/audio_manager_android.h
+++ b/media/audio/android/audio_manager_android.h
@@ -25,6 +25,8 @@ class MEDIA_EXPORT AudioManagerAndroid : public AudioManagerBase {
       scoped_refptr<base::SingleThreadTaskRunner> worker_task_runner,
       AudioLogFactory* audio_log_factory);
 
+  void InitializeIfNeeded();
+
   // Implementation of AudioManager.
   bool HasAudioOutputDevices() override;
   bool HasAudioInputDevices() override;
@@ -80,8 +82,7 @@ class MEDIA_EXPORT AudioManagerAndroid : public AudioManagerBase {
       const AudioParameters& input_params) override;
 
  private:
-  void InitializeOnAudioThread();
-
+  jobject GetJavaAudioManager();
   bool HasNoAudioInputStreams();
   void SetCommunicationAudioModeOn(bool on);
   bool SetAudioDevice(const std::string& device_id);