Deprecate EventSource.URL and WebSocket.URL

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 28 matching lines @@
     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,
     WillBeGarbageCollected,
     ImplementedAs=DOMWebSocket,
 ] interface WebSocket : EventTarget {
-    [MeasureAs=WebSocketURL] readonly attribute DOMString URL; // Lowercased .url is the one in the spec, but leaving .URL for compatibility reasons.
+    [DeprecateAs=WebSocketURL] readonly attribute DOMString URL; // Lowercased .url is the one in the spec, but leaving .URL for compatibility reasons.
     readonly attribute DOMString url;
 
     // ready state
     const unsigned short CONNECTING = 0;
     const unsigned short OPEN = 1;
     const unsigned short CLOSING = 2;
     const unsigned short CLOSED = 3;
     readonly attribute unsigned short readyState;
     readonly attribute unsigned long bufferedAmount;
 
     // 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;
     [RaisesException] void send(DOMString data);
     [RaisesException] void send(Blob data);
     [RaisesException] void send(ArrayBuffer data);
     [RaisesException] void send(ArrayBufferView data);
 };