Move the Widget hierarchy to the Oilpan heap.

Source/web/PopupMenuTest.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 108 matching lines @@
     virtual void popupDidHide() { }
     virtual bool itemIsSeparator(unsigned listIndex) const { return false; }
     virtual bool itemIsLabel(unsigned listIndex) const { return false; }
     virtual bool itemIsSelected(unsigned listIndex) const { return listIndex == m_selectIndex; }
     virtual bool valueShouldChangeOnHotTrack() const { return false; }
     virtual void setTextFromItem(unsigned listIndex) { }
 
     virtual FontSelector* fontSelector() const { return 0; }
     virtual HostWindow* hostWindow() const { return 0; }
 
-    virtual PassRefPtr<Scrollbar> createScrollbar(ScrollableArea*, ScrollbarOrientation, ScrollbarControlSize) { return nullptr; }
+    virtual PassRefPtrWillBeRawPtr<Scrollbar> createScrollbar(ScrollableArea*, ScrollbarOrientation, ScrollbarControlSize) { return nullptr; }
 
     void setDisabledIndex(unsigned index) { m_disabledIndexSet.insert(index); }
     void setFocusedNode(Node* node) { m_node = node; }
     void setListSize(int listSize) { m_listSize = listSize; }
 
 private:
     unsigned m_selectIndex;
     std::set<unsigned> m_disabledIndexSet;
     Node* m_node;
     int m_listSize;
@@ skipping 462 matching lines @@
     ASSERT(menuList);
     menuList->showPopup();
     ASSERT(popupOpen());
     PopupListBox* listBox = webView()->selectPopup()->listBox();
     int ltrWidth = listBox->getRowBaseWidth(0);
     int rtlWidth = listBox->getRowBaseWidth(1);
     EXPECT_LT(rtlWidth, ltrWidth);
 }
 
 } // namespace