Move minitest.dart into the expect package.

pkg/dev_compiler/test/codegen/lib/html/htmloptionscollection_test.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.
 
 import 'dart:html';
 
-import 'package:minitest/minitest.dart';
+import 'package:expect/minitest.dart';
 
 main() {
   test('indexedAccessTest', () {
     // FIXME: we need some massaging to dart:html to enable HTMLOptionsCollection.add
     // and hence programatic building of collection.
     SelectElement selectElement = new Element.html('''
       <select>
         <option value="0">Option0</option>
         <option value="1">Option1</option>
         <option value="2">Option2</option>
       ''');
     final optionsCollection = selectElement.options;
 
     expect(optionsCollection[0].value, equals('0'));
     expect(optionsCollection[1].value, equals('1'));
     expect(optionsCollection[2].value, equals('2'));
 
     expect(optionsCollection[0].text, equals('Option0'));
     expect(optionsCollection[1].text, equals('Option1'));
     expect(optionsCollection[2].text, equals('Option2'));
 
     expect(() { (optionsCollection as dynamic)[0] = 1; }, throws);
 
     // OPTIONALS optionsCollection[0] = new OptionElement(value: '42', data: 'Option42');
     expect(() {
       optionsCollection[0] = new OptionElement(data: 'Option42', value: '42');
     }, throws);
   });
 }