IDL: Add support for [Unscopeable] on attributes and methods

Source/bindings/tests/results/core/V8TestInterfaceCustomConstructor.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file has been auto-generated by code_generator_v8.py. DO NOT MODIFY!
 
 #ifndef V8TestInterfaceCustomConstructor_h
 #define V8TestInterfaceCustomConstructor_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
@@ skipping 21 matching lines @@
     static void refObject(ScriptWrappable*);
     static void derefObject(ScriptWrappable*);
     template<typename VisitorDispatcher>
     static void trace(VisitorDispatcher visitor, ScriptWrappable* scriptWrappable)
     {
     }
     static void constructorCallback(const v8::FunctionCallbackInfo<v8::Value>&);
     static void constructorCustom(const v8::FunctionCallbackInfo<v8::Value>&);
     static const int internalFieldCount = v8DefaultWrapperInternalFieldCount + 0;
     static void installConditionallyEnabledProperties(v8::Local<v8::Object>, v8::Isolate*) { }
-    static void installConditionallyEnabledMethods(v8::Local<v8::Object>, v8::Isolate*) { }
+    static void preparePrototypeObject(v8::Isolate*, v8::Local<v8::Object>) { }
 };
 
 template <>
 struct V8TypeOf<TestInterfaceCustomConstructor> {
     typedef V8TestInterfaceCustomConstructor Type;
 };
 
 } // namespace blink
 
 #endif // V8TestInterfaceCustomConstructor_h