IDL: Support iterable<>, maplike<> and setlike<> syntax

Source/core/testing/Internals.idl

 /*
  * 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.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
  *     documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 [
     DoNotCheckConstants,
     GarbageCollected,
-    Iterable,
 ] interface Internals {
     DOMString address(Node node);
 
     GCObservation observeGC(any observed);
 
     [RaisesException, TypeChecking=Interface] DOMString elementRenderTreeAsText(Element element);
     boolean isPreloaded(DOMString url);
     boolean isLoadingFromMemoryCache(DOMString url);
 
     [TypeChecking=Interface] boolean isSharingStyle(Element element1, Element element2);
@@ skipping 251 matching lines @@
     void showAllTransitionElements();
     void setExitTransitionStylesheetsEnabled(boolean enabled);
 
     [RaisesException, TypeChecking=Interface] void forcePluginPlaceholder(HTMLElement plugin, DocumentFragment fragment);
     [RaisesException, TypeChecking=Interface] void forcePluginPlaceholder(HTMLElement plugin, PluginPlaceholderOptions options);
 
     DictionaryTest dictionaryTest();
     UnionTypesTest unionTypesTest();
 
     void forceBlinkGCWithoutV8GC();
+
+    iterable<long>;
 };