Remove some unused functions in core

Source/core/page/EventHandler.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 76 matching lines @@
 public:
     explicit EventHandler(LocalFrame*);
     ~EventHandler();
     void trace(Visitor*);
 
     void clear();
     void nodeWillBeRemoved(Node&);
 
     void updateSelectionForMouseDrag();
 
-    Node* mousePressNode() const;
-
 #if OS(WIN)
     void startPanScrolling(LayoutObject*);
 #endif
 
     void stopAutoscroll();
 
     void dispatchFakeMouseMoveEventSoon();
     void dispatchFakeMouseMoveEventSoonInQuad(const FloatQuad&);
 
     HitTestResult hitTestResultAtPoint(const LayoutPoint&,
@@ skipping 287 matching lines @@
     bool m_longTapShouldInvokeContextMenu;
 
     Timer<EventHandler> m_activeIntervalTimer;
     double m_lastShowPressTimestamp;
     RefPtrWillBeMember<Element> m_lastDeferredTapElement;
 };
 
 } // namespace blink
 
 #endif // EventHandler_h