Remove RED/RTX workaround from sender/receiver and VideoEngine2.

webrtc/video/video_send_stream_tests.cc

Index: webrtc/video/video_send_stream_tests.cc
diff --git a/webrtc/video/video_send_stream_tests.cc b/webrtc/video/video_send_stream_tests.cc
index 5c836e0f99b61faf33bb75a89890b31a381dc8d6..b1f4a9b48868c8ae0da25aee3882e632b3bbfdd7 100644
--- a/webrtc/video/video_send_stream_tests.cc
+++ b/webrtc/video/video_send_stream_tests.cc
@@ -517,23 +517,23 @@ TEST_F(VideoSendStreamTest, SupportsUlpfecWithoutExtensions) {
 // bandwidth since the receiver has to wait for FEC retransmissions to determine
 // that the received state is actually decodable.
 TEST_F(VideoSendStreamTest, DoesNotUtilizeUlpfecForH264WithNackEnabled) {
-  UlpfecObserver test(false, true, true, false, "H264");
+  UlpfecObserver test(false, true, false, false, "H264");
   RunBaseTest(&test);
 }
 
 // Without retransmissions FEC for H264 is fine.
-TEST_F(VideoSendStreamTest, DoesUtilizeRedForH264WithoutNackEnabled) {
+TEST_F(VideoSendStreamTest, DoesUtilizeUlpfecForH264WithoutNackEnabled) {
   UlpfecObserver test(false, false, true, true, "H264");
   RunBaseTest(&test);
 }
 
-TEST_F(VideoSendStreamTest, DoesUtilizeRedForVp8WithNackEnabled) {
+TEST_F(VideoSendStreamTest, DoesUtilizeUlpfecForVp8WithNackEnabled) {
   UlpfecObserver test(false, true, true, true, "VP8");
   RunBaseTest(&test);
 }
 
 #if !defined(RTC_DISABLE_VP9)
-TEST_F(VideoSendStreamTest, DoesUtilizeRedForVp9WithNackEnabled) {
+TEST_F(VideoSendStreamTest, DoesUtilizeUlpfecForVp9WithNackEnabled) {
   UlpfecObserver test(false, true, true, true, "VP9");
   RunBaseTest(&test);
 }