Delete FrameInput method and FrameInputWrapper class.

talk/app/webrtc/videosource.h

 /*
  * libjingle
  * Copyright 2012 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 56 matching lines @@
   static rtc::scoped_refptr<VideoSource> Create(
       cricket::ChannelManager* channel_manager,
       cricket::VideoCapturer* capturer,
       const webrtc::MediaConstraintsInterface* constraints,
       bool remote);
 
   SourceState state() const override { return state_; }
   bool remote() const override { return remote_; }
 
   virtual const cricket::VideoOptions* options() const { return &options_; }
-  virtual cricket::VideoRenderer* FrameInput();
+  // TODO(nisse): Dummy implementation. Delete as soon as chrome's
+  // MockVideoSource is updated.
+  virtual cricket::VideoRenderer* FrameInput() { return nullptr; }
 
   virtual cricket::VideoCapturer* GetVideoCapturer() {
     return video_capturer_.get();
   }
 
   void Stop() override;
   void Restart() override;
 
   // |output| will be served video frames as long as the underlying capturer
   // is running video frames.
@@ skipping 20 matching lines @@
 
   cricket::VideoFormat format_;
   cricket::VideoOptions options_;
   SourceState state_;
   const bool remote_;
 };
 
 }  // namespace webrtc
 
 #endif  // TALK_APP_WEBRTC_VIDEOSOURCE_H_