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 68d6857e29d7208d85a8af114227b5fb951b25f9..6c633deced1a32a124be800474bcf7aaef537dee 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() {