Fix broken FEC full stack tests

Bug: webrtc:8588
Change-Id: Iac476fc2031d2687fb6ac45f4f159f1ac87fdaba
Reviewed-on: https://webrtc-review.googlesource.com/36061
Reviewed-by: Åsa Persson <asapersson@webrtc.org>
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#21428}
diff --git a/video/video_quality_test.cc b/video/video_quality_test.cc
index bf2ec8c..da9d4d2 100644
--- a/video/video_quality_test.cc
+++ b/video/video_quality_test.cc
@@ -1559,7 +1559,8 @@
 
   // FEC supported only for single video stream mode yet.
   if (params_.video[0].flexfec) {
-    // Override send config constructed by CreateSendConfig.
+    video_send_configs_[0].rtp.flexfec.payload_type = kFlexfecPayloadType;
+    video_send_configs_[0].rtp.flexfec.ssrc = kFlexfecSendSsrc;
     if (decode_all_receive_streams) {
       for (uint32_t media_ssrc : video_send_configs_[0].rtp.ssrcs) {
         video_send_configs_[0].rtp.flexfec.protected_media_ssrcs.push_back(