Enable Oilpan for core/clipboard/

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 260 matching lines @@
     visitor->trace(m_touchSequenceDocument);
     visitor->trace(m_scrollGestureHandlingNode);
     visitor->trace(m_previousGestureScrolledNode);
     visitor->trace(m_lastDeferredTapElement);
     visitor->trace(m_currentScrollChain);
 #endif
 }
 
 DragState& EventHandler::dragState()
 {
-    DEFINE_STATIC_LOCAL(OwnPtrWillBePersistent<DragState>, state, (adoptPtrWillBeNoop(new DragState())));
+    DEFINE_STATIC_LOCAL(Persistent<DragState>, state, (new DragState()));
     return *state;
 }
 
 void EventHandler::clear()
 {
     m_hoverTimer.stop();
     m_cursorUpdateTimer.stop();
     m_fakeMouseMoveEventTimer.stop();
     m_activeIntervalTimer.stop();
     m_resizeScrollableArea = nullptr;
@@ skipping 3766 matching lines @@
 bool EventHandler::passWheelEventToWidget(const PlatformWheelEvent& wheelEvent, Widget& widget)
 {
     // If not a FrameView, then probably a plugin widget.  Those will receive
     // the event via an EventTargetNode dispatch when this returns false.
     if (!widget.isFrameView())
         return false;
 
     return toFrameView(&widget)->frame().eventHandler().handleWheelEvent(wheelEvent);
 }
 
-PassRefPtrWillBeRawPtr<DataTransfer> EventHandler::createDraggingDataTransfer() const
+DataTransfer* EventHandler::createDraggingDataTransfer() const
 {
     return DataTransfer::create(DataTransfer::DragAndDrop, DataTransferWritable, DataObject::create());
 }
 
 void EventHandler::focusDocumentView()
 {
     Page* page = m_frame->page();
     if (!page)
         return;
     page->focusController().focusDocumentView(m_frame);
 }
 
 unsigned EventHandler::accessKeyModifiers()
 {
 #if OS(MACOSX)
     return PlatformEvent::CtrlKey | PlatformEvent::AltKey;
 #else
     return PlatformEvent::AltKey;
 #endif
 }
 
 } // namespace blink