Oilpan: Move core/clipboard/ to oilpan's heap

Source/core/page/EventHandler.cpp

Index: Source/core/page/EventHandler.cpp
diff --git a/Source/core/page/EventHandler.cpp b/Source/core/page/EventHandler.cpp
index 43d96fa010d3d273a657f943bb249de7923a33aa..827f3b5d0490a7643876466a29142f3cb7bc8f67 100644
--- a/Source/core/page/EventHandler.cpp
+++ b/Source/core/page/EventHandler.cpp
@@ -306,10 +306,12 @@ EventHandler::~EventHandler()
     ASSERT(!m_fakeMouseMoveEventTimer.isActive());
 }
 
+DEFINE_GC_INFO(DragState);
+
 DragState& EventHandler::dragState()
 {
-    DEFINE_STATIC_LOCAL(DragState, state, ());
-    return state;
+    DEFINE_STATIC_LOCAL(Persistent<DragState>, state, ());
+    return *state;
 }
 
 void EventHandler::clear()
@@ -3995,7 +3997,7 @@ bool EventHandler::passWidgetMouseDownEventToWidget(const MouseEventWithHitTestR
     return false;
 }
 
-PassRefPtr<Clipboard> EventHandler::createDraggingClipboard() const
+PassRefPtrWillBeRawPtr<Clipboard> EventHandler::createDraggingClipboard() const
 {
     return Clipboard::create(Clipboard::DragAndDrop, ClipboardWritable, DataObject::create());
 }