Oilpan: move DOM string collection objects to the Oilpan heap.

Source/core/dom/DOMSettableTokenList.h

Index: Source/core/dom/DOMSettableTokenList.h
diff --git a/Source/core/dom/DOMSettableTokenList.h b/Source/core/dom/DOMSettableTokenList.h
index 2a59e85b8197b562e941aa7bc0716fbef7534ead..bba9691d7a6b43e66e6a69fa6f9cd2752cc4e2be 100644
--- a/Source/core/dom/DOMSettableTokenList.h
+++ b/Source/core/dom/DOMSettableTokenList.h
@@ -27,6 +27,7 @@
 
 #include "core/dom/DOMTokenList.h"
 #include "core/dom/SpaceSplitString.h"
+#include "platform/heap/Handle.h"
 #include "wtf/RefCounted.h"
 #include "wtf/text/AtomicString.h"
 
@@ -34,17 +35,24 @@ namespace WebCore {
 
 class ExceptionState;
 
-class DOMSettableTokenList FINAL : public DOMTokenList, public RefCounted<DOMSettableTokenList> {
-    WTF_MAKE_FAST_ALLOCATED;
+class DOMSettableTokenList FINAL
+    : public DOMTokenList
+#if !ENABLE(OILPAN)
+    , public RefCounted<DOMSettableTokenList>
+#endif
+    {
+    WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
 public:
-    static PassRefPtr<DOMSettableTokenList> create()
+    static PassRefPtrWillBeRawPtr<DOMSettableTokenList> create()
     {
-        return adoptRef(new DOMSettableTokenList());
+        return adoptRefWillBeNoop(new DOMSettableTokenList());
     }
     virtual ~DOMSettableTokenList();
 
+#if !ENABLE(OILPAN)
     virtual void ref() OVERRIDE { RefCounted<DOMSettableTokenList>::ref(); }
     virtual void deref() OVERRIDE { RefCounted<DOMSettableTokenList>::deref(); }
+#endif
 
     virtual unsigned length() const OVERRIDE { return m_tokens.size(); }
     virtual const AtomicString item(unsigned index) const OVERRIDE;