Support devFS writes via HTTP PUT

sdk/lib/vmservice/message.dart

 // Copyright (c) 2013, 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.
 
 part of dart._vmservice;
 
 class Message {
   final Completer _completer = new Completer.sync();
   bool get completed => _completer.isCompleted;
   /// Future of response.
@@ skipping 33 matching lines @@
   static String _methodNameFromUri(Uri uri) {
     if (uri == null) {
       return '';
     }
     if (uri.pathSegments.length == 0) {
       return '';
     }
     return uri.pathSegments[0];
   }
 
+  Message.forMethod(String method)
+      : client = null, method = method, serial = '';
+
   Message.fromUri(this.client, Uri uri)
       : serial = '', method = _methodNameFromUri(uri) {
     params.addAll(uri.queryParameters);
   }
 
   Message.forIsolate(this.client, Uri uri, RunningIsolate isolate)
       : serial = '', method = _methodNameFromUri(uri) {
     params.addAll(uri.queryParameters);
     params['isolateId'] = isolate.serviceId;
   }
@@ skipping 113 matching lines @@
 
   void setErrorResponse(int code, String details) {
     _completer.complete(encodeRpcError(this, code,
                                        details: '$method: $details'));
   }
 }
 
 external bool sendIsolateServiceMessage(SendPort sp, List m);
 external void sendRootServiceMessage(List m);
 external void sendObjectRootServiceMessage(List m);