Deprecate LogCB in favor of using MediaLog

media/filters/source_buffer_stream.h

Index: media/filters/source_buffer_stream.h
diff --git a/media/filters/source_buffer_stream.h b/media/filters/source_buffer_stream.h
index afef6f74202dc025ad202083a4a2dcca842c3d22..b4063602c8745da415735db688457f1a9c6b20a7 100644
--- a/media/filters/source_buffer_stream.h
+++ b/media/filters/source_buffer_stream.h
@@ -54,13 +54,13 @@ class MEDIA_EXPORT SourceBufferStream {
   };
 
   SourceBufferStream(const AudioDecoderConfig& audio_config,
-                     const LogCB& log_cb,
+                     const scoped_refptr<MediaLog>& media_log,
                      bool splice_frames_enabled);
   SourceBufferStream(const VideoDecoderConfig& video_config,
-                     const LogCB& log_cb,
+                     const scoped_refptr<MediaLog>& media_log,
                      bool splice_frames_enabled);
   SourceBufferStream(const TextTrackConfig& text_config,
-                     const LogCB& log_cb,
+                     const scoped_refptr<MediaLog>& media_log,
                      bool splice_frames_enabled);
 
   ~SourceBufferStream();
@@ -328,9 +328,9 @@ class MEDIA_EXPORT SourceBufferStream {
   // appropriately and returns true.  Otherwise returns false.
   bool SetPendingBuffer(scoped_refptr<StreamParserBuffer>* out_buffer);
 
-  // Callback used to report log messages that can help the web developer figure
-  // out what is wrong with the content.
-  LogCB log_cb_;
+  // Used to report log messages that can help the web developer figure out what
+  // is wrong with the content.
+  scoped_refptr<MediaLog> media_log_;
 
   // List of disjoint buffered ranges, ordered by start time.
   RangeList ranges_;