Make cricket::VideoFrame inherit webrtc::VideoFrame.

webrtc/media/base/mediachannel.h

 /*
  *  Copyright (c) 2004 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 13 matching lines @@
 #include "webrtc/base/logging.h"
 #include "webrtc/base/networkroute.h"
 #include "webrtc/base/optional.h"
 #include "webrtc/base/sigslot.h"
 #include "webrtc/base/socket.h"
 #include "webrtc/base/window.h"
 #include "webrtc/config.h"
 #include "webrtc/media/base/codec.h"
 #include "webrtc/media/base/mediaconstants.h"
 #include "webrtc/media/base/streamparams.h"
+#include "webrtc/media/base/videoframe.h"
 #include "webrtc/media/base/videosinkinterface.h"
 #include "webrtc/media/base/videosourceinterface.h"
 // TODO(juberti): re-evaluate this include
 #include "webrtc/pc/audiomonitor.h"
 
 namespace rtc {
 class RateLimiter;
 class Timing;
 }
 
 namespace webrtc {
 class AudioSinkInterface;
 }
 
 namespace cricket {
 
 class AudioSource;
 class ScreencastId;
 class VideoCapturer;
+// TODO(nisse): For some reason, forward declaration doens't work when
+// the definition is a "using" alias.
+#if 0
 class VideoFrame;
+#endif
 struct RtpHeader;
 struct VideoFormat;
 
 const int kScreencastDefaultFps = 5;
 
 template <class T>
 static std::string ToStringIfSet(const char* key, const rtc::Optional<T>& val) {
   std::string str;
   if (val) {
     str = key;
@@ skipping 1066 matching lines @@
   // Signal when the media channel is ready to send the stream. Arguments are:
   //     writable(bool)
   sigslot::signal1<bool> SignalReadyToSend;
   // Signal for notifying that the remote side has closed the DataChannel.
   sigslot::signal1<uint32_t> SignalStreamClosedRemotely;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_MEDIA_BASE_MEDIACHANNEL_H_