Add content type information to encoded images and corresponding rtp extension header

webrtc/media/engine/fakewebrtcvideocapturemodule.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 54 matching lines @@
   void SendFrame(int w, int h) {
     if (!running_) return;
 
     rtc::scoped_refptr<webrtc::I420Buffer> buffer =
         webrtc::I420Buffer::Create(w, h);
     // Initialize memory to satisfy DrMemory tests. See
     // https://bugs.chromium.org/p/libyuv/issues/detail?id=377
     buffer->InitializeData();
     if (callback_) {
       callback_->OnFrame(
-          webrtc::VideoFrame(buffer, 0, 0, webrtc::kVideoRotation_0));
+          webrtc::VideoFrame(buffer, 0, 0, webrtc::kVideoRotation_0,
+                             webrtc::VideoContentType::kDefault));
     }
   }
 
   const webrtc::VideoCaptureCapability& cap() const {
     return cap_;
   }
 
  private:
   FakeWebRtcVcmFactory* factory_;
   rtc::VideoSinkInterface<webrtc::VideoFrame>* callback_;
   bool running_;
   webrtc::VideoCaptureCapability cap_;
 };
 
 #endif  // WEBRTC_MEDIA_ENGINE_FAKEWEBRTCVIDEOCAPTUREMODULE_H_