Start cleaning up the HTML tests.

pkg/dev_compiler/test/codegen/lib/html/canvas_pixel_array_type_alias_test.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
 
-library CanvasTest;
-import 'package:unittest/unittest.dart';
-import 'package:unittest/html_individual_config.dart';
 import 'dart:html';
 import 'dart:typed_data';
 
+import 'package:minitest/minitest.dart';
+
 // We have aliased the legacy type CanvasPixelArray with the new type
 // Uint8ClampedArray by mapping the CanvasPixelArray type tag to
 // Uint8ClampedArray.  It is not a perfect match since CanvasPixelArray is
 // missing the ArrayBufferView members.  These should appear to be null.
 
 var inscrutable;
 
 main() {
-
-  useHtmlIndividualConfiguration();
-
   inscrutable = (x) => x;
 
   int width = 100;
   int height = 100;
 
   CanvasElement canvas = new CanvasElement(width: width, height: height);
   document.body.append(canvas);
 
   CanvasRenderingContext2D context = canvas.context2D;
 
   group('basic', () {
     test('CreateImageData', () {
       ImageData image = context.createImageData(canvas.width,
                                                 canvas.height);
       List<int> data = image.data;
       // It is legal for the dart2js compiler to believe the type of the native
       //   ImageData.data and elides the check, so check the type explicitly:
       expect(inscrutable(data) is List<int>, isTrue,
           reason: 'canvas array type');
 
-      expect(data, hasLength(40000));
+      expect(data.length, 40000);
       checkPixel(data, 0, [0, 0, 0, 0]);
       checkPixel(data, width * height - 1, [0, 0, 0, 0]);
 
       data[100] = 200;
       expect(data[100], equals(200));
     });
   });
 
   group('types1', () {
     test('isList', () {
@@ skipping 57 matching lines @@
     });
   });
 }
 
 void checkPixel(List<int> data, int offset, List<int> rgba) {
   offset *= 4;
   for (var i = 0; i < 4; ++i) {
     expect(rgba[i], equals(data[offset + i]));
   }
 }