Revert of Delete all use of cricket::VideoFrame and cricket::WebRtcVideoFrame.

webrtc/pc/channel.h

Index: webrtc/pc/channel.h
diff --git a/webrtc/pc/channel.h b/webrtc/pc/channel.h
index 5d6588e9814455defe0ec92cdf685bab0b015b92..45918ffca05d43a050a16ea13bbe474af03ad04a 100644
--- a/webrtc/pc/channel.h
+++ b/webrtc/pc/channel.h
@@ -548,8 +548,7 @@
     return static_cast<VideoMediaChannel*>(BaseChannel::media_channel());
   }
 
-  bool SetSink(uint32_t ssrc,
-               rtc::VideoSinkInterface<webrtc::VideoFrame>* sink);
+  bool SetSink(uint32_t ssrc, rtc::VideoSinkInterface<VideoFrame>* sink);
   // Get statistics about the current media session.
   bool GetStats(VideoMediaInfo* stats);
 
@@ -565,7 +564,7 @@
   bool SetVideoSend(uint32_t ssrc,
                     bool enable,
                     const VideoOptions* options,
-                    rtc::VideoSourceInterface<webrtc::VideoFrame>* source);
+                    rtc::VideoSourceInterface<cricket::VideoFrame>* source);
   webrtc::RtpParameters GetRtpSendParameters(uint32_t ssrc) const;
   bool SetRtpSendParameters(uint32_t ssrc,
                             const webrtc::RtpParameters& parameters);