Using native sampling rate and optimal buffer size for audio on Android.

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 d21d3a1513e495a5154f238d4f59bfbec38c73ae..86b11fdf7d12256f09b4c68f95044e16345240c2 100644
--- a/media/audio/android/audio_manager_android.h
+++ b/media/audio/android/audio_manager_android.h
@@ -52,6 +52,12 @@ class MEDIA_EXPORT AudioManagerAndroid : public AudioManagerBase {
   void SetAudioMode(int mode);
   void RegisterHeadsetReceiver();
   void UnregisterHeadsetReceiver();
+  int GetNativeOutputSampleRate();
+  int GetMinInputBufferSize(int rate, int channels);
+  int GetMinOutputBufferSize(int rate, int channels);
+  bool IsAudioLowLatencySupported();
+  int GetAudioLowLatencyFrameSize();
+  int GetAudioOptimalOutputFrameSize(int sample_rate);
 
   // Java AudioManager instance.
   base::android::ScopedJavaGlobalRef<jobject> j_audio_manager_;