Use enum BinaryType for WebSocket.binaryType, instead of DOMString

Source/modules/websockets/WebSocket.idl

 /*
  * Copyright (C) 2009 Google Inc.  All rights reserved.
  * Copyright (C) 2010, 2011 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 14 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * 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.
  */
 
 // http://dev.w3.org/html5/websockets/#websocket
 // http://www.whatwg.org/specs/web-apps/current-work/multipage/network.html#websocket
 
-// FIXME: use BinaryType in binaryType
 enum BinaryType { "blob", "arraybuffer" };
 
 [
     ActiveDOMObject,
     // FIXME: should be optional union type http://crbug.com/240176
     Constructor(DOMString url, optional DOMString protocol),
     Constructor(DOMString url, sequence<DOMString> protocols),
     ConstructorCallWith=ExecutionContext,
     Exposed=(Window,Worker),
     RaisesException=Constructor,
@@ skipping 14 matching lines @@
     // networking
              attribute EventHandler onopen;
              attribute EventHandler onerror;
              attribute EventHandler onclose;
     [TreatReturnedNullStringAs=Undefined] readonly attribute DOMString extensions;
     [TreatReturnedNullStringAs=Undefined] readonly attribute DOMString protocol;
     [RaisesException] void close([Clamp] optional unsigned short code, optional DOMString reason);
 
     // messaging
              attribute EventHandler onmessage;
-             attribute DOMString binaryType;
+             attribute BinaryType binaryType;
     [RaisesException] void send(DOMString data);
     [RaisesException] void send(Blob data);
     [RaisesException] void send(ArrayBuffer data);
     [RaisesException] void send(ArrayBufferView data);
 };