Added UMA metrics for MediaSourcePlayer and MediaCodecPlayer

media/base/android/media_codec_decoder.h

Index: media/base/android/media_codec_decoder.h
diff --git a/media/base/android/media_codec_decoder.h b/media/base/android/media_codec_decoder.h
index 72cbf1000100c24db50db5a9c972cfda44d53dd6..185b22c4a9b156c55db422c5ed6bbf0bc9dd9b3d 100644
--- a/media/base/android/media_codec_decoder.h
+++ b/media/base/android/media_codec_decoder.h
@@ -19,6 +19,7 @@
 
 namespace media {
 
+class FrameStatistics;
 class MediaCodecBridge;
 
 // The decoder for MediaCodecPlayer.
@@ -165,7 +166,9 @@ class MediaCodecDecoder {
       const base::Closure& stop_done_cb,
       const base::Closure& key_required_cb,
       const base::Closure& error_cb,
-      const char* decoder_thread_name);
+      const char* decoder_thread_name,
+      FrameStatistics* frame_statistics);
+
   virtual ~MediaCodecDecoder();
 
   virtual const char* class_name() const;
@@ -301,8 +304,9 @@ class MediaCodecDecoder {
   // Returns true if we are in the process of sync stop.
   bool InEmergencyStop() const { return GetState() == kInEmergencyStop; }
 
-  // Notifies the decoder if the frame is the last one.
-  void CheckLastFrame(bool eos_encountered, bool has_delayed_tasks);
+  // Notifies the decoder if the frame is the last one. Returns true if the
+  // current frame is the last frame.
+  bool CheckLastFrame(bool eos_encountered, bool has_delayed_tasks);
 
   const char* AsString(RenderMode render_mode);
 
@@ -321,6 +325,9 @@ class MediaCodecDecoder {
   // The queue of access units.
   AccessUnitQueue au_queue_;
 
+  // Statistics for UMA.
+  FrameStatistics* frame_statistics_;
+
   // Flag forces reconfiguration even if |media_codec_bridge_| exists. Currently
   // is set by video decoder when the video surface changes.
   bool needs_reconfigure_;