[Remoting Host] Supporting WebRTC VP9 streaming

remoting/protocol/webrtc_frame_scheduler_simple.cc

Index: remoting/protocol/webrtc_frame_scheduler_simple.cc
diff --git a/remoting/protocol/webrtc_frame_scheduler_simple.cc b/remoting/protocol/webrtc_frame_scheduler_simple.cc
index 0c44c9ff55df04bb72907ccf060a15cdab582b8b..526ba6125a28cbd40a324bc501a02a7ccefe4f94 100644
--- a/remoting/protocol/webrtc_frame_scheduler_simple.cc
+++ b/remoting/protocol/webrtc_frame_scheduler_simple.cc
@@ -132,6 +132,7 @@ WebrtcFrameSchedulerSimple::~WebrtcFrameSchedulerSimple() {}
 
 void WebrtcFrameSchedulerSimple::OnKeyFrameRequested() {
   DCHECK(thread_checker_.CalledOnValidThread());
+  encoder_ready_ = true;
   key_frame_request_ = true;
   ScheduleNextFrame(base::TimeTicks::Now());
 }
@@ -274,8 +275,8 @@ void WebrtcFrameSchedulerSimple::OnFrameEncoded(
 void WebrtcFrameSchedulerSimple::ScheduleNextFrame(base::TimeTicks now) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
-  if (paused_ || pacing_bucket_.rate() == 0 || capture_callback_.is_null() ||
-      frame_pending_) {
+  if (!encoder_ready_ || paused_ || pacing_bucket_.rate() == 0 ||
+      capture_callback_.is_null() || frame_pending_) {
     return;
   }