Add all dart:html tests from the sdk to test/codegen.

test/codegen/lib/html/request_animation_frame_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.
+
+library RequestAnimationFrameTest;
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_config.dart';
+import 'dart:html';
+
+main() {
+  useHtmlConfiguration();
+
+  test('oneShot', () {
+      var frame = window.requestAnimationFrame(
+          expectAsync((timestamp) { }));
+    });
+
+  test('twoShot', () {
+      var frame = window.requestAnimationFrame(
+          expectAsync((timestamp1) {
+            window.requestAnimationFrame(
+                expectAsync((timestamp2) {
+                    // Not monotonic on Safari and IE.
+                    // expect(timestamp2, greaterThan(timestamp1),
+                    //    reason: 'timestamps ordered');
+                  }));
+          }));
+    });
+
+
+  // How do we test that a callback is never called?  We can't wrap the uncalled
+  // callback with 'expectAsync'.  Will request several frames and try
+  // cancelling the one that is not the last.
+  test('cancel1', () {
+      var frame1 = window.requestAnimationFrame(
+          (timestamp1) {
+            throw new Exception('Should have been cancelled');
+          });
+      var frame2 = window.requestAnimationFrame(
+          expectAsync((timestamp2) { }));
+      window.cancelAnimationFrame(frame1);
+    });
+
+  test('cancel2', () {
+      var frame1 = window.requestAnimationFrame(
+          expectAsync((timestamp1) { }));
+      var frame2 = window.requestAnimationFrame(
+          (timestamp2) {
+            throw new Exception('Should have been cancelled');
+          });
+      var frame3 = window.requestAnimationFrame(
+          expectAsync((timestamp3) { }));
+      window.cancelAnimationFrame(frame2);
+    });
+}