Implement platform deleters per spec.

Source/core/storage/Storage.h

 /*
  * Copyright (C) 2008 Apple 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
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 #ifndef Storage_h
 #define Storage_h
 
 #include "bindings/v8/ScriptWrappable.h"
+#include "bindings/v8/V8Binding.h"
 #include "core/frame/DOMWindowProperty.h"
 #include "core/storage/StorageArea.h"
 #include "wtf/Forward.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 
 namespace WebCore {
 
 class ExceptionState;
 class Frame;
@@ skipping 10 matching lines @@
     void removeItem(const String& key, ExceptionState& ec) { m_storageArea->removeItem(key, ec, m_frame); }
     void clear(ExceptionState& ec) { m_storageArea->clear(ec, m_frame); }
     bool contains(const String& key, ExceptionState& ec) const { return m_storageArea->contains(key, ec, m_frame); }
 
     StorageArea* area() const { return m_storageArea.get(); }
 
     String anonymousIndexedGetter(unsigned, ExceptionState&);
     String anonymousNamedGetter(const AtomicString&, ExceptionState&);
     bool anonymousNamedSetter(const AtomicString& name, const AtomicString& value, ExceptionState&);
     bool anonymousIndexedSetter(unsigned, const AtomicString&, ExceptionState&);
-    bool anonymousNamedDeleter(const AtomicString&, ExceptionState&);
-    bool anonymousIndexedDeleter(unsigned, ExceptionState&);
+    DeleteResult anonymousNamedDeleter(const AtomicString&, ExceptionState&);
+    DeleteResult anonymousIndexedDeleter(unsigned, ExceptionState&);
     void namedPropertyEnumerator(Vector<String>&, ExceptionState&);
     bool namedPropertyQuery(const AtomicString&, ExceptionState&);
 
 private:
     Storage(Frame*, PassOwnPtr<StorageArea>);
 
     OwnPtr<StorageArea> m_storageArea;
 };
 
 } // namespace WebCore
 
 #endif // Storage_h