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

Source/bindings/core/v8/V8PerContextData.cpp

Index: Source/bindings/core/v8/V8PerContextData.cpp
diff --git a/Source/bindings/core/v8/V8PerContextData.cpp b/Source/bindings/core/v8/V8PerContextData.cpp
index 33e95c88c5c9dbe07d09d3eb39eda08f4178edf7..03c0602a776ee6283e028a6161a766b9194814bb 100644
--- a/Source/bindings/core/v8/V8PerContextData.cpp
+++ b/Source/bindings/core/v8/V8PerContextData.cpp
@@ -114,7 +114,7 @@ v8::Local<v8::Function> V8PerContextData::constructorForTypeSlowCase(const Wrapp
     if (prototypeObject->InternalFieldCount() == v8PrototypeInternalFieldcount
         && type->wrapperTypePrototype == WrapperTypeInfo::WrapperTypeObjectPrototype)
         prototypeObject->SetAlignedPointerInInternalField(v8PrototypeTypeIndex, const_cast<WrapperTypeInfo*>(type));
-    type->installConditionallyEnabledMethods(prototypeObject, m_isolate);
+    type->preparePrototypeObject(m_isolate, prototypeObject);
     if (type->wrapperTypePrototype == WrapperTypeInfo::WrapperTypeExceptionPrototype) {
         if (!v8CallBoolean(prototypeObject->SetPrototype(currentContext, m_errorPrototype.newLocal(m_isolate))))
             return v8::Local<v8::Function>();