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

Source/core/testing/Internals.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  * Copyright (C) 2013 Apple 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.
@@ skipping 2340 matching lines @@
 ValueIterable<int>::IterationSource* Internals::startIteration(ScriptState*, ExceptionState&)
 {
     return new InternalsIterationSource();
 }
 
 bool Internals::isUseCounted(Document* document, int useCounterId)
 {
     return UseCounter::isCounted(*document, static_cast<UseCounter::Feature>(useCounterId));
 }
 
+String Internals::unscopeableAttribute()
+{
+    return "unscopeableAttribute";
+}
+
+String Internals::unscopeableMethod()
+{
+    return "unscopeableMethod";
+}
 
 } // namespace blink