Reland of Add framerate to VideoSinkWants and ability to signal on overuse

webrtc/video/end_to_end_tests.cc

Index: webrtc/video/end_to_end_tests.cc
diff --git a/webrtc/video/end_to_end_tests.cc b/webrtc/video/end_to_end_tests.cc
index 6f030c3b58ff6cc136f6b3ed10c9398a73ac155d..352043255744eca2afad180c018d53d08aff539e 100644
--- a/webrtc/video/end_to_end_tests.cc
+++ b/webrtc/video/end_to_end_tests.cc
@@ -229,7 +229,8 @@ TEST_F(EndToEndTest, RendersSingleDelayedFrame) {
       test::FrameGenerator::CreateSquareGenerator(kWidth, kHeight));
   test::FrameForwarder frame_forwarder;
   video_send_stream_->SetSource(
-      &frame_forwarder, VideoSendStream::DegradationPreference::kBalanced);
+      &frame_forwarder,
+      VideoSendStream::DegradationPreference::kMaintainFramerate);
 
   frame_forwarder.IncomingCapturedFrame(*frame_generator->NextFrame());
   EXPECT_TRUE(renderer.Wait())
@@ -274,7 +275,8 @@ TEST_F(EndToEndTest, TransmitsFirstFrame) {
                                                   kDefaultHeight));
   test::FrameForwarder frame_forwarder;
   video_send_stream_->SetSource(
-      &frame_forwarder, VideoSendStream::DegradationPreference::kBalanced);
+      &frame_forwarder,
+      VideoSendStream::DegradationPreference::kMaintainFramerate);
   frame_forwarder.IncomingCapturedFrame(*frame_generator->NextFrame());
 
   EXPECT_TRUE(renderer.Wait())
@@ -1508,7 +1510,7 @@ class MultiStreamTest {
           width, height, 30, Clock::GetRealTimeClock());
       send_streams[i]->SetSource(
           frame_generators[i],
-          VideoSendStream::DegradationPreference::kBalanced);
+          VideoSendStream::DegradationPreference::kMaintainFramerate);
       frame_generators[i]->Start();
     }
 
@@ -1955,7 +1957,7 @@ TEST_F(EndToEndTest, ObserversEncodedFrames) {
                                                   kDefaultHeight));
   test::FrameForwarder forwarder;
   video_send_stream_->SetSource(
-      &forwarder, VideoSendStream::DegradationPreference::kBalanced);
+      &forwarder, VideoSendStream::DegradationPreference::kMaintainFramerate);
   forwarder.IncomingCapturedFrame(*frame_generator->NextFrame());
 
   EXPECT_TRUE(post_encode_observer.Wait())