Bug 1282792: start transmitting OR receiving if track is active r=bwc

MozReview-Commit-ID: GaT5v9UN6ox

--HG--
extra : rebase_source : d7140ffe87f9ea42cc29cc96c3a92270c34d88a8

media/webrtc/signaling/src/peerconnection/MediaPipelineFactory.cpp

@@ -463,10 +463,18 @@ MediaPipelineFactory::CreateOrUpdateMediaPipeline(
   }
 
   if (aTrack.GetActive()) {
-    auto error = conduit->StartTransmitting();
+    if (receiving) {
-    if (error) {
+      auto error = conduit->StartReceiving();
-      MOZ_MTLOG(ML_ERROR, "StartTransmitting failed: " << error);
+      if (error) {
-      return NS_ERROR_FAILURE;
+        MOZ_MTLOG(ML_ERROR, "StartReceiving failed: " << error);
+        return NS_ERROR_FAILURE;
+      }
+    } else {
+      auto error = conduit->StartTransmitting();
+      if (error) {
+        MOZ_MTLOG(ML_ERROR, "StartTransmitting failed: " << error);
+        return NS_ERROR_FAILURE;
+      }
     }
   }