Rework dispatchEvent so it is consistent for isTrusted support.

Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp

Index: Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp
diff --git a/Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp b/Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp
index 9459305c759c2b7bce0042ea12f7d23828087bd4..484e76f8f3131e3b677f00cad34470656305615d 100644
--- a/Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp
+++ b/Source/modules/serviceworkers/ServiceWorkerGlobalScope.cpp
@@ -189,10 +189,10 @@ const AtomicString& ServiceWorkerGlobalScope::interfaceName() const
     return EventTargetNames::ServiceWorkerGlobalScope;
 }
 
-bool ServiceWorkerGlobalScope::dispatchEvent(PassRefPtrWillBeRawPtr<Event> event)
+bool ServiceWorkerGlobalScope::dispatchEventInternal(PassRefPtrWillBeRawPtr<Event> event)
 {
     m_eventNestingLevel++;
-    bool result = WorkerGlobalScope::dispatchEvent(event.get());
+    bool result = WorkerGlobalScope::dispatchEventInternal(event.get());
     if (event->interfaceName() == EventNames::ErrorEvent && m_eventNestingLevel == 2 && !event->defaultPrevented())
         m_hadErrorInTopLevelEventHandler = true;
     m_eventNestingLevel--;