[bindings] Let NativeValueTraits<T>::nativeValue be variadic function and merge various convers…

Source/bindings/core/v8/ScriptValue.h

Index: Source/bindings/core/v8/ScriptValue.h
diff --git a/Source/bindings/core/v8/ScriptValue.h b/Source/bindings/core/v8/ScriptValue.h
index f6255e8f27ba77baeb601b49efd8c935c32ba432..7ad2aecaed7c51507d12e55ea33d1dd2cecd2704 100644
--- a/Source/bindings/core/v8/ScriptValue.h
+++ b/Source/bindings/core/v8/ScriptValue.h
@@ -52,10 +52,10 @@ public:
         return ScriptValue(scriptState, toV8(value, scriptState->context()->Global(), scriptState->isolate()));
     }
 
-    template<typename T>
-    inline T to(ExceptionState& exceptionState) const
+    template<typename T, typename... Arguments>
+    static inline T to(v8::Isolate* isolate, const ScriptValue& value, ExceptionState& exceptionState, Arguments const&... arguments)
     {
-        return NativeValueTraits<T>::nativeValue(isolate(), v8Value(), exceptionState);
+        return NativeValueTraits<T>::nativeValue(isolate, value.v8Value(), exceptionState, arguments...);
     }
 
     ScriptValue() { }