Bug 1449272 - Part 2: When using both offerToReceiveAudio and offerToReceiveVideo, create the audio transceiver first. r=jib

MozReview-Commit-ID: ClgChq6FLQ7

--HG--
extra : rebase_source : e2c2e9f2abd609522d618b6828c4447f4a515dd0

dom/media/PeerConnection.js

@@ -814,14 +814,14 @@ class RTCPeerConnection {
 
   // Handles offerToReceiveAudio/Video
   _ensureTransceiversForOfferToReceive(options) {
-    if (options.offerToReceiveVideo) {
-      this._ensureOfferToReceive("video");
-    }
-
     if (options.offerToReceiveAudio) {
       this._ensureOfferToReceive("audio");
     }
 
+    if (options.offerToReceiveVideo) {
+      this._ensureOfferToReceive("video");
+    }
+
     this._transceivers
       .filter(transceiver => {
         return (options.offerToReceiveVideo === false &&