Fix an issue that audio and video may ran out of sync

media/base/android/media_codec_bridge.h

Index: media/base/android/media_codec_bridge.h
diff --git a/media/base/android/media_codec_bridge.h b/media/base/android/media_codec_bridge.h
index f90edcf6ff61365caad8c2868582e5f57e04bda6..a1a493f1ac843a36440526d0d884b44936d90482 100644
--- a/media/base/android/media_codec_bridge.h
+++ b/media/base/android/media_codec_bridge.h
@@ -222,8 +222,9 @@ class AudioCodecBridge : public MediaCodecBridge {
              bool play_audio, jobject media_crypto) WARN_UNUSED_RESULT;
 
   // Play the output buffer. This call must be called after
-  // DequeueOutputBuffer() and before ReleaseOutputBuffer.
-  void PlayOutputBuffer(int index, size_t size);
+  // DequeueOutputBuffer() and before ReleaseOutputBuffer. Returns the playback
+  // head position expressed in frames.
+  int64 PlayOutputBuffer(int index, size_t size);
 
   // Set the volume of the audio output.
   void SetVolume(double volume);