Add an AudioTrack based audio output stream.

media/audio/android/audio_manager_android.cc

Index: media/audio/android/audio_manager_android.cc
diff --git a/media/audio/android/audio_manager_android.cc b/media/audio/android/audio_manager_android.cc
index 96a7c78c29c055d099f5ee985a8a591bfe44c3a8..512f1fcc7104d0641e4ede820bf3fb4be3daec33 100644
--- a/media/audio/android/audio_manager_android.cc
+++ b/media/audio/android/audio_manager_android.cc
@@ -17,6 +17,7 @@
 #include "media/audio/android/audio_record_input.h"
 #include "media/audio/android/opensles_input.h"
 #include "media/audio/android/opensles_output.h"
+#include "media/audio/android/audio_track_output_stream.h"
 #include "media/audio/audio_manager.h"
 #include "media/audio/audio_parameters.h"
 #include "media/audio/fake_audio_input_stream.h"
@@ -211,9 +212,10 @@ AudioOutputStream* AudioManagerAndroid::MakeLowLatencyOutputStream(
 
   // Set stream type which matches the current system-wide audio mode used by
   // the Android audio manager.
-  const SLint32 stream_type = communication_mode_is_on_ ?
-      SL_ANDROID_STREAM_VOICE : SL_ANDROID_STREAM_MEDIA;
-  return new OpenSLESOutputStream(this, params, stream_type);
+  // const SLint32 stream_type = communication_mode_is_on_ ?
+  //     SL_ANDROID_STREAM_VOICE : SL_ANDROID_STREAM_MEDIA;
+//  return new OpenSLESOutputStream(this, params, stream_type);
+  return new AudioTrackOutputStream(this, params);
 }
 
 AudioInputStream* AudioManagerAndroid::MakeLinearInputStream(