Deletes the class VideoRendererCallback.

webrtc/modules/video_render/ios/video_render_ios_channel.mm

Index: webrtc/modules/video_render/ios/video_render_ios_channel.mm
diff --git a/webrtc/modules/video_render/ios/video_render_ios_channel.mm b/webrtc/modules/video_render/ios/video_render_ios_channel.mm
index b2b15857f9317645f422233da545417e76bd9ede..9aba57e9e15745571ff7c420c9845cf707048c29 100644
--- a/webrtc/modules/video_render/ios/video_render_ios_channel.mm
+++ b/webrtc/modules/video_render/ios/video_render_ios_channel.mm
@@ -22,13 +22,10 @@ VideoRenderIosChannel::VideoRenderIosChannel(VideoRenderIosView* view)
 
 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() {