Deprecate LogCB in favor of using MediaLog

media/formats/mp4/track_run_iterator.h

Index: media/formats/mp4/track_run_iterator.h
diff --git a/media/formats/mp4/track_run_iterator.h b/media/formats/mp4/track_run_iterator.h
index b5009678b8bdc0625250901240203a1aac6206be..811e239868db77cbae00d5bcd42bb042d8adbc41 100644
--- a/media/formats/mp4/track_run_iterator.h
+++ b/media/formats/mp4/track_run_iterator.h
@@ -32,7 +32,7 @@ class MEDIA_EXPORT TrackRunIterator {
  public:
   // Create a new TrackRunIterator. A reference to |moov| will be retained for
   // the lifetime of this object.
-  TrackRunIterator(const Movie* moov, const LogCB& log_cb);
+  TrackRunIterator(const Movie* moov, const scoped_refptr<MediaLog>& media_log);
   ~TrackRunIterator();
 
   // Sets up the iterator to handle all the runs from the current fragment.
@@ -100,7 +100,7 @@ class MEDIA_EXPORT TrackRunIterator {
   const std::vector<uint8>& GetKeyId(size_t sample_index) const;
 
   const Movie* moov_;
-  LogCB log_cb_;
+  scoped_refptr<MediaLog> media_log_;
 
   std::vector<TrackRunInfo> runs_;
   std::vector<TrackRunInfo>::const_iterator run_itr_;