Bug 1181595 - MessagePortChild should check if the MessagePort is still alive before dispatching messages, r=smaug

dom/messagechannel/MessagePortChild.cpp

@@ -23,16 +23,18 @@ MessagePortChild::RecvStopSendingDataConfirmed()
 bool
 MessagePortChild::RecvEntangled(nsTArray<MessagePortMessage>&& aMessages)
 {
-  MOZ_ASSERT(mPort);
+  if (mPort) {
     mPort->Entangled(aMessages);
+  }
   return true;
 }
 
 bool
 MessagePortChild::RecvReceiveData(nsTArray<MessagePortMessage>&& aMessages)
 {
-  MOZ_ASSERT(mPort);
+  if (mPort) {
     mPort->MessagesReceived(aMessages);
+  }
   return true;
 }