Use new phantom handles for ScriptWrappable.

Source/bindings/core/v8/V8ValueCache.cpp

 /*
  * Copyright (C) 2009 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:
  * 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 14 matching lines @@
 
 #include "config.h"
 #include "bindings/core/v8/V8ValueCache.h"
 
 #include "bindings/core/v8/V8Binding.h"
 #include "wtf/text/StringHash.h"
 
 namespace blink {
 
 StringCacheMapTraits::MapType* StringCacheMapTraits::MapFromWeakCallbackData(
-    const v8::WeakCallbackData<v8::String, WeakCallbackDataType>& data)
+    const v8::PhantomCallbackData<WeakCallbackDataType>& data)
 {
     return &(V8PerIsolateData::from(data.GetIsolate())->stringCache()->m_stringCache);
 }
 
 
 void StringCacheMapTraits::Dispose(
     v8::Isolate* isolate, v8::UniquePersistent<v8::String> value, StringImpl* key)
 {
     V8PerIsolateData::from(isolate)->stringCache()->InvalidateLastString();
     key->deref();
@@ skipping 77 matching lines @@
     return newString;
 }
 
 void StringCache::InvalidateLastString()
 {
     m_lastStringImpl = nullptr;
     m_lastV8String.Reset();
 }
 
 } // namespace blink