Backed out changeset 65146cc073d4 (bug 1359017)

dom/webidl/DedicatedWorkerGlobalScope.webidl

@@ -24,5 +24,4 @@ interface DedicatedWorkerGlobalScope : WorkerGlobalScope {
   void close();
 
   attribute EventHandler onmessage;
-  attribute EventHandler onmessageerror;
 };

dom/webidl/Worker.webidl

@@ -22,7 +22,6 @@ interface Worker : EventTarget {
   void postMessage(any message, optional sequence<object> transfer = []);
 
   attribute EventHandler onmessage;
-  attribute EventHandler onmessageerror;
 };
 
 Worker implements AbstractWorker;

dom/workers/WorkerPrivate.cpp

@@ -755,7 +755,7 @@ public:
     }
 
     if (NS_WARN_IF(rv.Failed())) {
-      DispatchError(aTarget);
+      xpc::Throw(aCx, rv.StealNSResult());
       return false;
     }
 
@@ -814,21 +814,6 @@ private:
     return DispatchDOMEvent(aCx, aWorkerPrivate, aWorkerPrivate->GlobalScope(),
                             false);
   }
-
-  void
-  DispatchError(DOMEventTargetHelper* aTarget)
-  {
-    MessageEventInit init;
-    init.mBubbles = false;
-    init.mCancelable = false;
-
-    RefPtr<Event> event =
-      MessageEvent::Constructor(aTarget, NS_LITERAL_STRING("messageerror"), init);
-    event->SetTrusted(true);
-
-    bool dummy;
-    aTarget->DispatchEvent(event, &dummy);
-  }
 };
 
 class DebuggerMessageEventRunnable : public WorkerDebuggerRunnable {

dom/workers/WorkerPrivate.h

@@ -882,7 +882,6 @@ public:
   FlushReportsToSharedWorkers(nsIConsoleReportCollector* aReporter);
 
   IMPL_EVENT_HANDLER(message)
-  IMPL_EVENT_HANDLER(messageerror)
   IMPL_EVENT_HANDLER(error)
 
   // Check whether this worker is a secure context.  For use from the parent

dom/workers/WorkerScope.h

@@ -251,7 +251,6 @@ public:
   Close(JSContext* aCx);
 
   IMPL_EVENT_HANDLER(message)
-  IMPL_EVENT_HANDLER(messageerror)
 };
 
 class SharedWorkerGlobalScope final : public WorkerGlobalScope
@@ -397,7 +396,6 @@ public:
   PostMessage(const nsAString& aMessage);
 
   IMPL_EVENT_HANDLER(message)
-  IMPL_EVENT_HANDLER(messageerror)
 
   void
   SetImmediate(Function& aHandler, ErrorResult& aRv);