Oilpan: move node/element rare data objects 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 3622 matching lines @@
             changedTouches[pointState].m_touches->append(touch);
             changedTouches[pointState].m_targets.add(touchTarget);
         }
     }
     if (allTouchReleased)
         m_touchSequenceDocument.clear();
 
     // Now iterate the changedTouches list and m_targets within it, sending
     // events to the targets as required.
     bool swallowedEvent = false;
-    RefPtrWillBeRawPtr<TouchList> emptyList = TouchList::create();

[sof, 2014/05/03 15:05:34]

The compile fix from https://codereview.chromium.org/264773015/ included here;
will rebase away once the tree opens & it lands.

     for (unsigned state = 0; state != PlatformTouchPoint::TouchStateEnd; ++state) {
         if (!changedTouches[state].m_touches)
             continue;
 
         const AtomicString& stateName(eventNameForTouchPointState(static_cast<PlatformTouchPoint::State>(state)));
         const EventTargetSet& targetsForState = changedTouches[state].m_targets;
         for (EventTargetSet::const_iterator it = targetsForState.begin(); it != targetsForState.end(); ++it) {
             EventTarget* touchEventTarget = it->get();
             RefPtrWillBeRawPtr<TouchEvent> touchEvent = TouchEvent::create(
                 touches.get(), touchesByTarget.get(touchEventTarget), changedTouches[state].m_touches.get(),
@@ skipping 131 matching lines @@
 unsigned EventHandler::accessKeyModifiers()
 {
 #if OS(MACOSX)
     return PlatformEvent::CtrlKey | PlatformEvent::AltKey;
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace WebCore