Dart: Renames dart:mojo_blah -> mojo:blah

examples/dart/wget/main.dart

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Run with, e.g.:
 // mojo_shell "mojo:dart_wget http://www.google.com"
 
 import 'dart:async';
-import 'dart:mojo_application';
-import 'dart:mojo_bindings';
-import 'dart:mojo_core';
 import 'dart:typed_data';
+import 'mojo:application';
+import 'mojo:bindings';
+import 'mojo:core';
 
 import 'package:mojo/services/network/public/interfaces/network_service.mojom.dart';
 import 'package:mojo/services/network/public/interfaces/url_loader.mojom.dart';
 
 class WGet extends Application {
   NetworkServiceProxy _networkService;
   UrlLoaderProxy _urlLoaderProxy;
 
   WGet.fromHandle(MojoHandle handle) : super.fromHandle(handle);
 
@@ skipping 46 matching lines @@
     _urlLoaderProxy = null;
     _networkService = null;
   }
 }
 
 main(List args) {
   MojoHandle appHandle = new MojoHandle(args[0]);
   var wget = new WGet.fromHandle(appHandle);
   wget.listen();
 }