Bug 1632489 - Enable repaired-rtp-stream-id extension in jsep; r=bwc

Differential Revision: https://phabricator.services.mozilla.com/D74839

media/webrtc/signaling/src/jsep/JsepSessionImpl.cpp

@@ -406,6 +406,8 @@ std::vector<SdpExtmapAttributeList::Extmap> JsepSessionImpl::GetRtpExtensions(
         // TODO: Would it be worth checking that the direction is sane?
         AddVideoRtpExtension(webrtc::RtpExtension::kRtpStreamIdUri,
                              SdpDirectionAttribute::kSendonly);
+        AddVideoRtpExtension(webrtc::RtpExtension::kRepairedRtpStreamIdUri,
+                             SdpDirectionAttribute::kSendonly);
       }
       break;
     default:;