Added UMA metrics for MediaSourcePlayer and MediaCodecPlayer

media/base/android/media_codec_player.cc

Index: media/base/android/media_codec_player.cc
diff --git a/media/base/android/media_codec_player.cc b/media/base/android/media_codec_player.cc
index 5c4608bf64d683559af59658ed8cdc55db1cdda8..08cc4ca82209b5b06b6ae94a1876fed1a86be41d 100644
--- a/media/base/android/media_codec_player.cc
+++ b/media/base/android/media_codec_player.cc
@@ -98,6 +98,8 @@ MediaCodecPlayer::~MediaCodecPlayer()
   if (audio_decoder_)
     audio_decoder_->ReleaseDecoderResources();
 
+  media_stat_->StopAndReport();
+
   if (drm_bridge_) {
     DCHECK(cdm_registration_id_);
     drm_bridge_->UnregisterPlayer(cdm_registration_id_);
@@ -806,6 +808,8 @@ void MediaCodecPlayer::OnStopDone(DemuxerStream::Type type) {
       return;
   }
 
+  media_stat_->StopAndReport();
+
   // DetachListener to UI thread
   ui_task_runner_->PostTask(FROM_HERE, detach_listener_cb_);
 
@@ -850,6 +854,8 @@ void MediaCodecPlayer::OnStarvation(DemuxerStream::Type type) {
   SetState(kStateStopping);
   RequestToStopDecoders();
   SetPendingStart(true);
+
+  media_stat_->AddStarvation();
 }
 
 void MediaCodecPlayer::OnTimeIntervalUpdate(DemuxerStream::Type type,
@@ -1246,6 +1252,10 @@ MediaCodecPlayer::StartStatus MediaCodecPlayer::StartDecoders() {
 
   DVLOG(1) << __FUNCTION__ << " current_time:" << current_time;
 
+  // This methos needs to be called when decoder threads are not processing
+  // frames.
+  media_stat_->Start();
+
   if (!AudioFinished()) {
     if (!audio_decoder_->Start(current_time))
       return kStartFailed;
@@ -1268,6 +1278,8 @@ void MediaCodecPlayer::StopDecoders() {
 
   video_decoder_->SyncStop();
   audio_decoder_->SyncStop();
+
+  media_stat_->StopAndReport();
 }
 
 void MediaCodecPlayer::RequestToStopDecoders() {
@@ -1325,6 +1337,8 @@ void MediaCodecPlayer::ReleaseDecoderResources() {
   // At this point decoder threads should not be running
   if (interpolator_.interpolating())
     interpolator_.StopInterpolating();
+
+  media_stat_->StopAndReport();
 }
 
 void MediaCodecPlayer::CreateDecoders() {
@@ -1333,6 +1347,8 @@ void MediaCodecPlayer::CreateDecoders() {
 
   internal_error_cb_ = base::Bind(&MediaCodecPlayer::OnError, media_weak_this_);
 
+  media_stat_.reset(new MediaStatistics());
+
   audio_decoder_.reset(new MediaCodecAudioDecoder(
       GetMediaTaskRunner(), base::Bind(&MediaCodecPlayer::RequestDemuxerData,
                                        media_weak_this_, DemuxerStream::AUDIO),
@@ -1346,7 +1362,8 @@ void MediaCodecPlayer::CreateDecoders() {
                  DemuxerStream::AUDIO),
       internal_error_cb_,
       base::Bind(&MediaCodecPlayer::OnTimeIntervalUpdate, media_weak_this_,
-                 DemuxerStream::AUDIO)));
+                 DemuxerStream::AUDIO),
+      &media_stat_->AudioFrames()));
 
   video_decoder_.reset(new MediaCodecVideoDecoder(
       GetMediaTaskRunner(), base::Bind(&MediaCodecPlayer::RequestDemuxerData,
@@ -1363,7 +1380,8 @@ void MediaCodecPlayer::CreateDecoders() {
       base::Bind(&MediaCodecPlayer::OnTimeIntervalUpdate, media_weak_this_,
                  DemuxerStream::VIDEO),
       base::Bind(&MediaCodecPlayer::OnVideoResolutionChanged, media_weak_this_),
-      base::Bind(&MediaCodecPlayer::OnVideoCodecCreated, media_weak_this_)));
+      base::Bind(&MediaCodecPlayer::OnVideoCodecCreated, media_weak_this_),
+      &media_stat_->VideoFrames()));
 }
 
 bool MediaCodecPlayer::AudioFinished() const {