[oilpan] Completely move HTMLFormControlElement's hierarchy to the managed heap

Source/core/editing/DeleteSelectionCommand.cpp

 /*
  * Copyright (C) 2005 Apple Computer, 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 776 matching lines @@
     if (!m_hasSelectionToDelete)
         m_selectionToDelete = endingSelection();
 
     if (!m_selectionToDelete.isNonOrphanedRange())
         return;
 
     String originalString = originalStringForAutocorrectionAtBeginningOfSelection();
 
     // If the deletion is occurring in a text field, and we're not deleting to replace the selection, then let the frame call across the bridge to notify the form delegate. 
     if (!m_replace) {
-        Element* textControl = enclosingTextFormControl(m_selectionToDelete.start());
+        Element* textControl = Handle<HTMLTextFormControlElement>(enclosingTextFormControl(m_selectionToDelete.start())).raw();
         if (textControl && textControl->focused())
             document()->frame()->editor()->textWillBeDeletedInTextField(textControl);
     }
 
     // save this to later make the selection with
     EAffinity affinity = m_selectionToDelete.affinity();
     
     Position downstreamEnd = m_selectionToDelete.end().downstream();
     m_needPlaceholder = isStartOfParagraph(m_selectionToDelete.visibleStart(), CanCrossEditingBoundary)
             && isEndOfParagraph(m_selectionToDelete.visibleEnd(), CanCrossEditingBoundary)
@@ skipping 65 matching lines @@
 
 // Normally deletion doesn't preserve the typing style that was present before it.  For example,
 // type a character, Bold, then delete the character and start typing.  The Bold typing style shouldn't
 // stick around.  Deletion should preserve a typing style that *it* sets, however.
 bool DeleteSelectionCommand::preservesTypingStyle() const
 {
     return m_typingStyle;
 }
 
 } // namespace WebCore