Let ViEEncoder express resolution requests as Sinkwants

webrtc/test/frame_generator.cc

Index: webrtc/test/frame_generator.cc
diff --git a/webrtc/test/frame_generator.cc b/webrtc/test/frame_generator.cc
index a6afce01d906ee20f78920c208a50f1e7fbe49c3..18376cca9b553726fb3e76058209d41080b8ada4 100644
--- a/webrtc/test/frame_generator.cc
+++ b/webrtc/test/frame_generator.cc
@@ -258,6 +258,7 @@ void FrameForwarder::AddOrUpdateSink(rtc::VideoSinkInterface<VideoFrame>* sink,
   rtc::CritScope lock(&crit_);
   RTC_DCHECK(!sink_ || sink_ == sink);
   sink_ = sink;
+  current_sink_wants_ = wants;
 }
 
 void FrameForwarder::RemoveSink(rtc::VideoSinkInterface<VideoFrame>* sink) {
@@ -266,6 +267,16 @@ void FrameForwarder::RemoveSink(rtc::VideoSinkInterface<VideoFrame>* sink) {
   sink_ = nullptr;
 }
 
+rtc::VideoSinkWants FrameForwarder::current_sink_wants() const {
+  rtc::CritScope lock(&crit_);
+  return current_sink_wants_;
+}
+
+size_t FrameForwarder::number_of_sinks() const {
+  rtc::CritScope lock(&crit_);
+  return sink_ ? 1u : 0u;
+}
+
 FrameGenerator* FrameGenerator::CreateChromaGenerator(size_t width,
                                                       size_t height) {
   return new ChromaGenerator(width, height);