[oilpan] Move EventHandler to the heap

Source/core/page/AutoscrollController.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 85 matching lines @@
     didPanScrollStop();
 #endif
 
     RenderBox* scrollable = m_autoscrollRenderer;
     m_autoscrollTimer.stop();
     m_autoscrollRenderer = 0;
 
     if (!scrollable)
         return;
 
-    EventHandler* eventHandler = m_frame->eventHandler();
+    HANDLE(EventHandler) eventHandler = m_frame->eventHandler();
     if (autoscrollInProgress() && eventHandler->mouseDownWasInSubframe()) {
         if (Frame* subframe = eventHandler->subframeForTargetNode(eventHandler->mousePressNode()))
             subframe->eventHandler()->stopAutoscrollTimer(rendererIsBeingDestroyed);
         return;
     }
 
     if (!rendererIsBeingDestroyed)
         scrollable->stopAutoscroll();
 #if ENABLE(PAN_SCROLLING)
     if (m_autoscrollType == AutoscrollForPanCanStop || m_autoscrollType == AutoscrollForPan) {
@@ skipping 134 matching lines @@
         stopAutoscrollTimer();
         return;
     }
 
     switch (m_autoscrollType) {
     case AutoscrollForDragAndDrop:
         if (WTF::currentTime() - m_dragAndDropAutoscrollStartTime > autoscrollDelay)
             m_autoscrollRenderer->autoscroll(m_dragAndDropAutoscrollReferencePosition);
         break;
     case AutoscrollForSelection: {
-        EventHandler* eventHandler = m_frame->eventHandler();
+        HANDLE(EventHandler) eventHandler = m_frame->eventHandler();
         if (!eventHandler->mousePressed()) {
             stopAutoscrollTimer();
             return;
         }
         eventHandler->updateSelectionForMouseDrag();
         m_autoscrollRenderer->autoscroll(eventHandler->lastKnownMousePosition());
         break;
     }
     case NoAutoscroll:
         break;
@@ skipping 47 matching lines @@
     } else if (east)
         view->setCursor(eastPanningCursor());
     else if (west)
         view->setCursor(westPanningCursor());
     else
         view->setCursor(middlePanningCursor());
 }
 #endif
 
 } // namespace WebCore