Deprecate LogCB in favor of using MediaLog

media/formats/webm/webm_tracks_parser.h

Index: media/formats/webm/webm_tracks_parser.h
diff --git a/media/formats/webm/webm_tracks_parser.h b/media/formats/webm/webm_tracks_parser.h
index 2801a3e532254a06403bb48b67468c70d1303b1b..d5513b520dac0f05a33acba26f6f5474209f5f2a 100644
--- a/media/formats/webm/webm_tracks_parser.h
+++ b/media/formats/webm/webm_tracks_parser.h
@@ -27,7 +27,8 @@ namespace media {
 // Parser for WebM Tracks element.
 class MEDIA_EXPORT WebMTracksParser : public WebMParserClient {
  public:
-  explicit WebMTracksParser(const LogCB& log_cb, bool ignore_text_tracks);
+  WebMTracksParser(const scoped_refptr<MediaLog>& media_log,
+                   bool ignore_text_tracks);
   ~WebMTracksParser() override;
 
   // Parses a WebM Tracks element in |buf|.
@@ -102,7 +103,7 @@ class MEDIA_EXPORT WebMTracksParser : public WebMParserClient {
   std::set<int64> ignored_tracks_;
   std::string audio_encryption_key_id_;
   std::string video_encryption_key_id_;
-  LogCB log_cb_;
+  scoped_refptr<MediaLog> media_log_;
 
   WebMAudioClient audio_client_;
   AudioDecoderConfig audio_decoder_config_;