Add WebrtcVideoEncoder interface

remoting/codec/video_encoder_verbatim.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef REMOTING_CODEC_VIDEO_ENCODER_VERBATIM_H_
 #define REMOTING_CODEC_VIDEO_ENCODER_VERBATIM_H_
 
 #include "base/macros.h"
 #include "remoting/codec/video_encoder.h"
 #include "remoting/codec/video_encoder_helper.h"
 
 namespace remoting {
 
 // VideoEncoderVerbatim implements a VideoEncoder that sends image data as a
 // sequence of RGB values, without compression.
 class VideoEncoderVerbatim : public VideoEncoder {
  public:
   VideoEncoderVerbatim();
   ~VideoEncoderVerbatim() override;
 
   // VideoEncoder interface.
-  std::unique_ptr<VideoPacket> Encode(const webrtc::DesktopFrame& frame,
-                                      uint32_t flags) override;
+  std::unique_ptr<VideoPacket> Encode(
+      const webrtc::DesktopFrame& frame) override;
 
  private:
   VideoEncoderHelper helper_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoEncoderVerbatim);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_CODEC_VIDEO_ENCODER_VERBATIM_H_