Add WebrtcVideoEncoder interface

remoting/protocol/webrtc_connection_to_client.cc

Index: remoting/protocol/webrtc_connection_to_client.cc
diff --git a/remoting/protocol/webrtc_connection_to_client.cc b/remoting/protocol/webrtc_connection_to_client.cc
index bb7fa3cb74deed6172060cbb355e135ea6f6d07c..8d93ef63c83fbc2ae736c03bfa0fe5fcfd877188 100644
--- a/remoting/protocol/webrtc_connection_to_client.cc
+++ b/remoting/protocol/webrtc_connection_to_client.cc
@@ -79,12 +79,9 @@ void WebrtcConnectionToClient::OnInputEventReceived(int64_t timestamp) {
 
 std::unique_ptr<VideoStream> WebrtcConnectionToClient::StartVideoStream(
     std::unique_ptr<webrtc::DesktopCapturer> desktop_capturer) {
-  // TODO(isheriff): make this codec independent
-  std::unique_ptr<VideoEncoder> video_encoder =
-      WebrtcVideoEncoderVpx::CreateForVP8();
   std::unique_ptr<WebrtcVideoStream> stream(new WebrtcVideoStream());
   if (!stream->Start(std::move(desktop_capturer), transport_.get(),
-                     video_encode_task_runner_, std::move(video_encoder))) {
+                     video_encode_task_runner_)) {
     return nullptr;
   }
   return std::move(stream);