bindings: Changes DOMWrapperMap::KeyType to ScriptWrappableBase*.

Source/bindings/core/v8/DOMWrapperMap.h

 /*
  * Copyright (C) 2012 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 137 matching lines @@
         // Dispose traits:
         // Generally nothing to do, but see below for a specialization for
         // DomWrapperMap<void>.
         static void Dispose(v8::Isolate* isolate, v8::UniquePersistent<v8::Object> value, KeyType* key) { }
     };
 
     v8::Isolate* m_isolate;
     typename PersistentValueMapTraits::MapType m_map;
 };
 
-template <>
-inline void DOMWrapperMap<void>::PersistentValueMapTraits::Dispose(
-    v8::Isolate* isolate,
-    v8::UniquePersistent<v8::Object> value,
-    void* key)
-{
-    RELEASE_ASSERT(!value.IsEmpty()); // See crbug.com/368095.
-    releaseObject(v8::Local<v8::Object>::New(isolate, value));
-}
-
 } // namespace blink
 
 #endif // DOMWrapperMap_h