Add initial support for [Exposed=xx] extended IDL attribute

Source/core/dom/Promise.idl

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 callback PromiseInit = void (any resolve, any reject);
 callback AnyCallback = any (optional any value);
 [
    CustomConstructor(PromiseInit init),
-   GlobalContext=Window&WorkerGlobalScope,
+   Exposed=Window&Worker
 ] interface Promise {
    [Custom] Promise then(optional AnyCallback fulfillCallback, optional AnyCallback rejectCallback);
    [Custom] Promise catch(optional AnyCallback rejectCallback);
 
    [Custom] static Promise resolve(any value);
    [Custom] static Promise reject(any value);
 
    [Custom] static Promise cast(any value);
    [Custom] static Promise race(any iterable);
    [Custom] static Promise all(any iterable);
 };