Move direct use of VideoCapturer::VideoAdapter to VideoSinkWants.

webrtc/media/base/videocapturer.cc

Index: webrtc/media/base/videocapturer.cc
diff --git a/webrtc/media/base/videocapturer.cc b/webrtc/media/base/videocapturer.cc
index f2933240f9ca6483d6b1f30292ea92807ff7757a..b9d865ef46adff30826ce6b24b438889fa3b747d 100644
--- a/webrtc/media/base/videocapturer.cc
+++ b/webrtc/media/base/videocapturer.cc
@@ -320,6 +320,7 @@ void VideoCapturer::GetStats(VariableInfo<int>* adapt_drops_stats,
 void VideoCapturer::RemoveSink(
     rtc::VideoSinkInterface<cricket::VideoFrame>* sink) {
   broadcaster_.RemoveSink(sink);
+  OnSinkWantsChanged(broadcaster_.wants());
 }
 
 void VideoCapturer::AddOrUpdateSink(
@@ -334,6 +335,11 @@ void VideoCapturer::OnSinkWantsChanged(const rtc::VideoSinkWants& wants) {
   if (frame_factory_) {
     frame_factory_->SetApplyRotation(apply_rotation_);
   }
+
+  if (video_adapter()) {
+    video_adapter()->OnCpuResolutionRequest(wants.max_pixel_count,
+                                            wants.max_pixel_count_step_up);
+  }
 }
 
 void VideoCapturer::OnFrameCaptured(VideoCapturer*,