Add framerate to VideoSinkWants and ability to signal on overuse

webrtc/test/call_test.cc

Index: webrtc/test/call_test.cc
diff --git a/webrtc/test/call_test.cc b/webrtc/test/call_test.cc
index 5bfcb4d1a15f0fa358f72afc803b062acd0fe31c..cf55c2d85662b6022aec24ee0d6a2869840068d9 100644
--- a/webrtc/test/call_test.cc
+++ b/webrtc/test/call_test.cc
@@ -285,7 +285,7 @@ void CallTest::CreateFrameGeneratorCapturerWithDrift(Clock* clock,
       width, height, framerate * speed, clock));
   video_send_stream_->SetSource(
       frame_generator_capturer_.get(),
-      VideoSendStream::DegradationPreference::kBalanced);
+      VideoSendStream::DegradationPreference::kMaintainFramerate);
 }
 
 void CallTest::CreateFrameGeneratorCapturer(int framerate,
@@ -295,7 +295,7 @@ void CallTest::CreateFrameGeneratorCapturer(int framerate,
       test::FrameGeneratorCapturer::Create(width, height, framerate, clock_));
   video_send_stream_->SetSource(
       frame_generator_capturer_.get(),
-      VideoSendStream::DegradationPreference::kBalanced);
+      VideoSendStream::DegradationPreference::kMaintainFramerate);
 }
 
 void CallTest::CreateFakeAudioDevices() {