Add Event.isTrusted support

Source/core/frame/LocalDOMWindow.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 1350 matching lines @@
     InspectorInstrumentation::loadEventFired(frame());
 }
 
 bool LocalDOMWindow::dispatchEvent(PassRefPtrWillBeRawPtr<Event> prpEvent, PassRefPtrWillBeRawPtr<EventTarget> prpTarget)
 {
     ASSERT(!EventDispatchForbiddenScope::isEventDispatchForbidden());
 
     RefPtrWillBeRawPtr<EventTarget> protect(this);
     RefPtrWillBeRawPtr<Event> event = prpEvent;
 
+    event->setTrusted(true);
     event->setTarget(prpTarget ? prpTarget : this);
     event->setCurrentTarget(this);
     event->setEventPhase(Event::AT_TARGET);
 
     TRACE_EVENT1("devtools.timeline", "EventDispatch", "data", InspectorEventDispatchEvent::data(*event));
     return fireEventListeners(event.get());
 }
 
 void LocalDOMWindow::removeAllEventListeners()
 {
@@ skipping 105 matching lines @@
     DOMWindow::trace(visitor);
     DOMWindowLifecycleNotifier::trace(visitor);
 }
 
 LocalFrame* LocalDOMWindow::frame() const
 {
     return m_frameObserver->frame();
 }
 
 } // namespace blink