Oilpan: Prepare to move select and option elements to Oilpan heap.

Source/core/html/HTMLOptionElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2004, 2005, 2006, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2011 Motorola Mobility, Inc.  All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 144 matching lines @@
 int HTMLOptionElement::index() const
 {
     // It would be faster to cache the index, but harder to get it right in all cases.
 
     HTMLSelectElement* selectElement = ownerSelectElement();
     if (!selectElement)
         return 0;
 
     int optionIndex = 0;
 
-    const Vector<HTMLElement*>& items = selectElement->listItems();
+    const WillBeHeapVector<RawPtrWillBeMember<HTMLElement> >& items = selectElement->listItems();
     size_t length = items.size();
     for (size_t i = 0; i < length; ++i) {
         if (!isHTMLOptionElement(*items[i]))
             continue;
-        if (items[i] == this)
+        if (items[i].get() == this)
             return optionIndex;
         ++optionIndex;
     }
 
     return 0;
 }
 
 void HTMLOptionElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
 {
     if (name == valueAttr) {
@@ skipping 194 matching lines @@
     // Check for parent optgroup having display NONE
     if (parent && isHTMLOptGroupElement(*parent)) {
         if (toHTMLOptGroupElement(*parent).isDisplayNone())
             return true;
     }
     RenderStyle* style = nonRendererStyle();
     return style && style->display() == NONE;
 }
 
 } // namespace WebCore