[oilpan] Move EventHandler to the heap

Source/core/page/EventHandler.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2012 Digia Plc. 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.
@@ skipping 93 matching lines @@
 #include "core/svg/SVGElementInstance.h"
 #include "core/svg/SVGUseElement.h"
 #endif
 
 #if ENABLE(CSS_IMAGE_SET)
 #include "core/rendering/style/StyleCachedImageSet.h"
 #endif
 
 namespace WebCore {
 
+DEFINE_GC_MAP(EventHandler);
+
 using namespace HTMLNames;
 
 // The link drag hysteresis is much larger than the others because there
 // needs to be enough space to cancel the link press without starting a link drag,
 // and because dragging links is rare.
 const int LinkDragHysteresis = 40;
 const int ImageDragHysteresis = 5;
 const int TextDragHysteresis = 3;
 const int GeneralDragHysteresis = 3;
 
@@ skipping 3878 matching lines @@
 
 unsigned EventHandler::accessKeyModifiers()
 {
 #if OS(DARWIN)
     return PlatformEvent::CtrlKey | PlatformEvent::AltKey;
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
+void EventHandler::accept(Visitor* visitor) const
+{
+    visitor->visit(m_mousePressNode);
+    visitor->visit(m_capturingMouseEventsNode);
+    visitor->visit(m_nodeUnderMouse);
+    visitor->visit(m_lastNodeUnderMouse);
+    visitor->visit(m_clickNode);
+    visitor->visit(m_dragTarget);
+    visitor->visit(m_frameSetBeingResized);
+    visitor->visit(m_latchedWheelEventNode);
+    visitor->visit(m_previousWheelScrolledNode);
+    visitor->visit(m_originatingTouchPointDocument);
+    visitor->visit(m_scrollGestureHandlingNode);
+    visitor->visit(m_previousGestureScrolledNode);
+}
+
 } // namespace WebCore