Remove uses of unittest in the HTML tests where possible.

pkg/dev_compiler/test/codegen/lib/html/webgl_1_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 web_gl_test;
-import 'package:unittest/unittest.dart';
-import 'package:unittest/html_individual_config.dart';
 import 'dart:html';
 import 'dart:typed_data';
 import 'dart:web_gl';
 import 'dart:web_gl' as gl;
 
+import 'package:expect/minitest.dart';
+
 // Test that WebGL is present in dart:web_gl API
 
+final isRenderingContext = predicate((x) => x is RenderingContext);
+final isContextAttributes = predicate((x) => x is gl.ContextAttributes);
+
 main() {
-  useHtmlIndividualConfiguration();
-
   group('supported', () {
     test('supported', () {
       expect(RenderingContext.supported, isTrue);
     });
   });
 
   group('functional', () {
     test('unsupported fails', () {
       var canvas = new CanvasElement();
       var context = canvas.getContext3d();
       if (RenderingContext.supported) {
         expect(context, isNotNull);
-        expect(context, new isInstanceOf<RenderingContext>());
+        expect(context, isRenderingContext);
       } else {
         expect(context, isNull);
       }
     });
 
     if (RenderingContext.supported) {
       test('simple', () {
         var canvas = new CanvasElement();
-        var context = canvas.getContext('experimental-webgl');
+        var context =
+            canvas.getContext('experimental-webgl') as gl.RenderingContext;
         var shader = context.createShader(gl.VERTEX_SHADER);
         context.shaderSource(shader, 'void main() { }');
         context.compileShader(shader);
         var success = context.getShaderParameter(shader, gl.COMPILE_STATUS);
         expect(success, isTrue);
       });
 
       test('getContext3d', () {
         var canvas = new CanvasElement();
         var context = canvas.getContext3d();
         expect(context, isNotNull);
-        expect(context, new isInstanceOf<RenderingContext>());
+        expect(context, isRenderingContext);
 
         context = canvas.getContext3d(depth: false);
         expect(context, isNotNull);
-        expect(context, new isInstanceOf<RenderingContext>());
+        expect(context, isRenderingContext);
       });
 
       test('texImage2D', () {
         var canvas = new CanvasElement();
         var context = canvas.getContext3d();
         var pixels = new Uint8List.fromList([0,0,3,255,0,0,0,0,0,0]);
         context.texImage2DUntyped(1, 1, 1, 1, 10, 10, 1, 1, pixels);
 
         canvas = new CanvasElement();
         document.body.children.add(canvas);
@@ skipping 22 matching lines @@
         context.texSubImage2DCanvas(1, 1, 1, 1, 1, 10, new CanvasElement());
         context.texSubImage2DVideo(1, 1, 1, 1, 1, 10, new VideoElement());
       });
 
       test('getContextAttributes', () {
         var canvas = new CanvasElement();
         var context = canvas.getContext3d();
         var attributes = context.getContextAttributes();
 
         expect(attributes, isNotNull);
-        expect(attributes, new isInstanceOf<gl.ContextAttributes>());
+        expect(attributes, isContextAttributes);
 
         expect(attributes.alpha, isBoolean);
         expect(attributes.antialias, isBoolean);
         expect(attributes.depth, isBoolean);
         expect(attributes.premultipliedAlpha, isBoolean);
         expect(attributes.preserveDrawingBuffer, isBoolean);
         expect(attributes.stencil, isBoolean);
       });
     }
   });
 }
 
 Matcher isBoolean = anyOf(isTrue, isFalse);