Bug 1297911 - followup: if block needs to be braced; r=jib

MozReview-Commit-ID: I44jAWKquTd

--HG--
extra : rebase_source : a59a286a63aa12ff8f10aae340d0ad7b6f028c98

dom/media/MediaManager.cpp

@@ -2782,9 +2782,10 @@ MediaManager::RemoveMediaDevicesCallback(uint64_t aWindowID)
     if (mediadevices) {
       nsPIDOMWindowInner* window = mediadevices->GetOwner();
       MOZ_ASSERT(window);
-      if (window && window->WindowID() == aWindowID)
+      if (window && window->WindowID() == aWindowID) {
         DeviceChangeCallback::RemoveDeviceChangeCallback(observer);
         return;
+      }
     }
   }
 }