Deletes the class VideoRendererCallback.

webrtc/modules/video_render/ios/video_render_ios_channel.mm

 /*
  *  Copyright (c) 2013 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.
  */
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 #include "webrtc/modules/video_render/ios/video_render_ios_channel.h"
 
 using namespace webrtc;
 
 VideoRenderIosChannel::VideoRenderIosChannel(VideoRenderIosView* view)
     : view_(view), current_frame_(new VideoFrame()), buffer_is_updated_(false) {
 }
 
 VideoRenderIosChannel::~VideoRenderIosChannel() { delete current_frame_; }
 
-int32_t VideoRenderIosChannel::RenderFrame(const uint32_t stream_id,
-                                           const VideoFrame& video_frame) {
+void VideoRenderIosChannel::OnFrame(const VideoFrame& video_frame) {
   current_frame_->CopyFrame(video_frame);
   current_frame_->set_render_time_ms(0);
   buffer_is_updated_ = true;
-
-  return 0;
 }
 
 bool VideoRenderIosChannel::RenderOffScreenBuffer() {
   if (![view_ renderFrame:current_frame_]) {
     return false;
   }
 
   buffer_is_updated_ = false;
 
   return true;
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     return -1;
   }
 
   return 0;
 }