- Change "static final" to "static const" in the runtime/ directory.

runtime/bin/websocket.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /**
  * The web socket protocol is implemented by a HTTP server handler
  * which can be instantiated like this:
  *
  *     WebSocketHandler wsHandler = new WebSocketHandler();
  *
@@ skipping 187 matching lines @@
 
 /**
  * Alternative web socket client interface. This interface is compliant
  * with the W3C browser API for web sockets specified in
  * http://dev.w3.org/html5/websockets/.
  */
 interface WebSocket default _WebSocket {
   /**
    * Possible states of the connection.
    */
-  static final int CONNECTING = 0;
-  static final int OPEN = 1;
-  static final int CLOSING = 2;
-  static final int CLOSED = 3;
+  static const int CONNECTING = 0;
+  static const int OPEN = 1;
+  static const int CLOSING = 2;
+  static const int CLOSED = 3;
 
   /**
    * Create a new web socket connection. The URL supplied in [url]
    * must use the scheme [:ws:]. The [protocols] argument is either a
    * [:String:] or [:List<String>:] specifying the subprotocols the
    * client is willing to speak.
    */
   WebSocket(String url, [protocols]);
 
   /**
@@ skipping 56 matching lines @@
    */
   void send(data);
 }
 
 
 class WebSocketException implements Exception {
   const WebSocketException([String this.message = ""]);
   String toString() => "WebSocketException: $message";
   final String message;
 }