Remove reporting statistics reporting from chrome://media-internals and fix event logging.

media/base/media_log_event.h

Index: media/base/media_log_event.h
diff --git a/media/base/media_log_event.h b/media/base/media_log_event.h
index 4167c8936a2fdebcd2f04a9886d5e2bd1088ba54..b3015709b89e1651f2e59811103efa33160c7131 100644
--- a/media/base/media_log_event.h
+++ b/media/base/media_log_event.h
@@ -69,11 +69,6 @@ struct MediaLogEvent {
     //         "buffer_current": <current offset>.
     //         "buffer_end": <last buffered byte>.
     BUFFERED_EXTENTS_CHANGED,
-
-    // The recorded statistics of the media pipeline have been updated.
-    // params: "audio_bytes_decoded", "video_bytes_decoded",
-    //         "video_frames_decoded", "video_frames_dropped": <integers>.
-    STATISTICS_UPDATED,
   };
 
   int32 id;