Delete unused and almost unused frame-related methods.

webrtc/media/engine/webrtcvideoframe.h

Index: webrtc/media/engine/webrtcvideoframe.h
diff --git a/webrtc/media/engine/webrtcvideoframe.h b/webrtc/media/engine/webrtcvideoframe.h
index 7f2a5c6059fd6bd632567c4b644eca02fb3197d5..487e32ef9af23630f749f65dca93558d80555eef 100644
--- a/webrtc/media/engine/webrtcvideoframe.h
+++ b/webrtc/media/engine/webrtcvideoframe.h
@@ -63,9 +63,6 @@ class WebRtcVideoFrame : public VideoFrame {
   void InitToEmptyBuffer(int w, int h);
   void InitToEmptyBuffer(int w, int h, int64_t time_stamp_ns);
 
-  // TODO(nisse): Deprecated, delete as soon as Chrome is updated.
-  bool InitToBlack(int w, int h, int64_t time_stamp_ns);
-
   int width() const override;
   int height() const override;