Add <menuitem>, new HTMLMenuElement IDL attributes.

Source/core/events/RelatedEvent.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef RelatedEvent_h
 #define RelatedEvent_h
 
 #include "core/events/Event.h"
 
 namespace blink {
 
 struct RelatedEventInit : public EventInit {
     RelatedEventInit();
     RefPtrWillBeMember<EventTarget> relatedTarget;
 };
 
 class RelatedEvent FINAL : public Event {
 public:
     static PassRefPtrWillBeRawPtr<RelatedEvent> create();
     static PassRefPtrWillBeRawPtr<RelatedEvent> create(const AtomicString& type, bool canBubble, bool cancelable, EventTarget* relatedTarget);
     static PassRefPtrWillBeRawPtr<RelatedEvent> create(const AtomicString& eventType, const RelatedEventInit&);
 
     virtual ~RelatedEvent();
 
     EventTarget* relatedTarget() const { return m_relatedTarget.get(); }
-    void setRelatedTarget(EventTarget* relatedTarget) { m_relatedTarget = relatedTarget; }
-
 
     virtual const AtomicString& interfaceName() const OVERRIDE { return EventNames::RelatedEvent; }
     virtual bool isRelatedEvent() const OVERRIDE { return true; }
 
     virtual void trace(Visitor*) OVERRIDE;
 
 private:
     RelatedEvent();
     RelatedEvent(const AtomicString& type, bool canBubble, bool cancelable, EventTarget*);
     RelatedEvent(const AtomicString& type, const RelatedEventInit&);
 
     RefPtrWillBeMember<EventTarget> m_relatedTarget;
 };
 
 DEFINE_EVENT_TYPE_CASTS(RelatedEvent);
 
 } // namespace blink
 
 #endif // RelatedEvent_h