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

test/codegen/lib/html/track_element_constructor_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.
+
+// A regression test for dart2js generating illegal JavaScript code
+// dynamically in non-csp mode.  The name of the field "defaultValue"
+// in JavaScript is "default".  This meant that dart2js would create a
+// constructor function that looked like this:
+//
+// function TrackElement(default) { this.default = default; }
+
+import 'dart:html';
+
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_config.dart';
+
+void main() {
+  useHtmlConfiguration();
+  test('', () {
+    if (!TrackElement.supported) return;
+    document.body.append(new TrackElement()..defaultValue = true);
+    if (!document.query('track').defaultValue) {
+      throw 'Expected default value to be true';
+    }
+    document.query('track').defaultValue = false;
+    if (document.query('track').defaultValue) {
+      throw 'Expected default value to be false';
+    }
+  });
+}