Add Event.isTrusted support

Source/core/dom/Node.cpp

Index: Source/core/dom/Node.cpp
diff --git a/Source/core/dom/Node.cpp b/Source/core/dom/Node.cpp
index 9b0504fbd26ab90cdfb77e538837f2cbdd596baf..a0b127b3bb108f6a91361cd2727ffb82e293cbc3 100644
--- a/Source/core/dom/Node.cpp
+++ b/Source/core/dom/Node.cpp
@@ -1999,6 +1999,7 @@ void Node::handleLocalEvents(Event& event)
 
 void Node::dispatchScopedEvent(PassRefPtrWillBeRawPtr<Event> event)
 {
+    event->setTrusted(true);
     EventDispatcher::dispatchScopedEvent(*this, event->createMediator());
 }
 
@@ -2038,7 +2039,6 @@ bool Node::dispatchMouseEvent(const PlatformMouseEvent& nativeEvent, const Atomi
     int detail, Node* relatedTarget)
 {
     RefPtrWillBeRawPtr<MouseEvent> event = MouseEvent::create(eventType, document().domWindow(), nativeEvent, detail, relatedTarget);
-    event->setTrusted(true);
     return dispatchEvent(event);
 }