Make RTX pt/apt reconfigurable by calling WebRtcVideoChannel2::SetRecvParameters.

webrtc/video/video_quality_test.cc

Index: webrtc/video/video_quality_test.cc
diff --git a/webrtc/video/video_quality_test.cc b/webrtc/video/video_quality_test.cc
index bd9c4f089cc4f5a2b7199264da9b68d7e6882756..c1e07864d270aa9572667079e4e3a8a5e3d2c5c1 100644
--- a/webrtc/video/video_quality_test.cc
+++ b/webrtc/video/video_quality_test.cc
@@ -1124,8 +1124,8 @@ void VideoQualityTest::SetupVideo(Transport* send_transport,
 
   for (size_t i = 0; i < num_video_streams; ++i) {
     video_receive_configs_[i].rtp.nack.rtp_history_ms = kNackRtpHistoryMs;
-    video_receive_configs_[i].rtp.rtx[payload_type].ssrc = kSendRtxSsrcs[i];
-    video_receive_configs_[i].rtp.rtx[payload_type].payload_type =
+    video_receive_configs_[i].rtp.rtx_ssrc = kSendRtxSsrcs[i];
+    video_receive_configs_[i].rtp.rtx_payload_types[payload_type] =
         kSendRtxPayloadType;
     video_receive_configs_[i].rtp.transport_cc = params_.call.send_side_bwe;
   }