Add framerate to VideoSinkWants and ability to signal on overuse

webrtc/media/engine/fakewebrtccall.h

Index: webrtc/media/engine/fakewebrtccall.h
diff --git a/webrtc/media/engine/fakewebrtccall.h b/webrtc/media/engine/fakewebrtccall.h
index 1c9212d02a2a29ccad7ca2b344b57122508aecfd..6b2542245e7e88eb22cf84d5da1831d344192043 100644
--- a/webrtc/media/engine/fakewebrtccall.h
+++ b/webrtc/media/engine/fakewebrtccall.h
@@ -138,6 +138,7 @@ class FakeVideoSendStream final
   bool resolution_scaling_enabled() const {
     return resolution_scaling_enabled_;
   }
+  bool framerate_scaling_enabled() const { return framerate_scaling_enabled_; }
   void InjectVideoSinkWants(const rtc::VideoSinkWants& wants);
 
   rtc::VideoSourceInterface<webrtc::VideoFrame>* source() const {
@@ -169,6 +170,7 @@ class FakeVideoSendStream final
     webrtc::VideoCodecVP9 vp9;
   } vpx_settings_;
   bool resolution_scaling_enabled_;
+  bool framerate_scaling_enabled_;
   rtc::VideoSourceInterface<webrtc::VideoFrame>* source_;
   int num_swapped_frames_;
   rtc::Optional<webrtc::VideoFrame> last_frame_;