Oilpan: move core/workers to oilpan's heap.

Source/core/workers/WorkerGlobalScope.idl

 /*
  * Copyright (C) 2008 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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 [
     Custom=ToV8,
     GlobalContext=WorkerGlobalScope,
+    WillBeGarbageCollected
 ] interface WorkerGlobalScope : EventTarget {
 
     // WorkerGlobalScope
     [Replaceable] readonly attribute WorkerGlobalScope self;
     [Replaceable] readonly attribute WorkerLocation location;
     void close();
     attribute EventHandler onerror;
     [Replaceable] readonly attribute WorkerConsole console;
 
 
     // WorkerUtils
     [RaisesException] void importScripts(DOMString... urls);
     [Replaceable] readonly attribute WorkerNavigator navigator;
 
     // Additional constructors
     attribute URLConstructor webkitURL; // FIXME: deprecate this.
 };
 
 WorkerGlobalScope implements ImageBitmapFactories;
 WorkerGlobalScope implements WindowBase64;
 WorkerGlobalScope implements WindowTimers;