Use new phantom handles for ScriptWrappable.

Source/bindings/core/v8/V8NPObject.cpp

Index: Source/bindings/core/v8/V8NPObject.cpp
diff --git a/Source/bindings/core/v8/V8NPObject.cpp b/Source/bindings/core/v8/V8NPObject.cpp
index d8f2e8dcb01b472f03ad597ac05cb2e18617cf0e..9b8de1d72671ef13529eefc91b444e06b2601b9a 100644
--- a/Source/bindings/core/v8/V8NPObject.cpp
+++ b/Source/bindings/core/v8/V8NPObject.cpp
@@ -180,10 +180,10 @@ public:
     static void DisposeCallbackData(WeakCallbackDataType* callbackData) { }
 
     static MapType* MapFromWeakCallbackData(
-        const v8::WeakCallbackData<v8::FunctionTemplate, WeakCallbackDataType>&);
+        const v8::PhantomCallbackData<WeakCallbackDataType>&);
 
     static PrivateIdentifier* KeyFromWeakCallbackData(
-        const v8::WeakCallbackData<v8::FunctionTemplate, WeakCallbackDataType>& data)
+        const v8::PhantomCallbackData<WeakCallbackDataType>& data)
     {
         return data.GetParameter();
     }
@@ -227,7 +227,7 @@ private:
     MapType m_map;
 };
 
-V8TemplateMapTraits::MapType* V8TemplateMapTraits::MapFromWeakCallbackData(const v8::WeakCallbackData<v8::FunctionTemplate, WeakCallbackDataType>& data)
+V8TemplateMapTraits::MapType* V8TemplateMapTraits::MapFromWeakCallbackData(const v8::PhantomCallbackData<WeakCallbackDataType>& data)
 {
     return &V8NPTemplateMap::sharedInstance(data.GetIsolate()).m_map;
 }