Revert of MediaRecorder: use VideoTrackRecorder::GetPreferredCodecId() when available

content/renderer/media/video_track_recorder.h

Index: content/renderer/media/video_track_recorder.h
diff --git a/content/renderer/media/video_track_recorder.h b/content/renderer/media/video_track_recorder.h
index d0f2c2ad77ecd6798b6b3f045fe47bde27856efc..e1db7fcf3def5f98669a69c182051cc3f81a76dd 100644
--- a/content/renderer/media/video_track_recorder.h
+++ b/content/renderer/media/video_track_recorder.h
@@ -37,12 +37,10 @@
 class CONTENT_EXPORT VideoTrackRecorder
     : NON_EXPORTED_BASE(public MediaStreamVideoSink) {
  public:
-  // Do not change the order of codecs; add new ones right before LAST.
   enum class CodecId {
     VP8,
     VP9,
     H264,
-    LAST
   };
   class Encoder;
 
@@ -51,8 +49,6 @@
                           std::unique_ptr<std::string> encoded_data,
                           base::TimeTicks capture_timestamp,
                           bool is_key_frame)>;
-
-  static CodecId GetPreferredCodecId();
 
   VideoTrackRecorder(CodecId codec,
                      const blink::WebMediaStreamTrack& track,