Split the constructors group in element_types_test into multiple files to narrow down timeouts

tests/html/element_types_constructors2_test.dart

Index: tests/html/element_types_constructors2_test.dart
diff --git a/tests/html/element_types_constructors2_test.dart b/tests/html/element_types_constructors2_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..96ee755cd6b0c5bc48ec435d2a24e5c18c04a13a
--- /dev/null
+++ b/tests/html/element_types_constructors2_test.dart
@@ -0,0 +1,39 @@
+// 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 element_types_constructors2_test;
+
+import 'package:unittest/unittest.dart';
+import 'package:unittest/html_individual_config.dart';
+import 'dart:html';
+
+main() {
+  useHtmlIndividualConfiguration();
+
+  check(String name, bool fn(), [bool supported = true]) {
+    test(name, () {
+      var expectation = supported ? returnsNormally : throws;
+      expect(() {
+        expect(fn(), isTrue);
+      }, expectation);
+    });
+  }
+
+  check('fieldset', () => new FieldSetElement() is FieldSetElement);
+  check('form', () => new FormElement() is FormElement);
+  check('head', () => new HeadElement() is HeadElement);
+  check('hr', () => new HRElement() is HRElement);
+  check('html', () => new HtmlHtmlElement() is HtmlHtmlElement);
+  check('h1', () => new HeadingElement.h1() is HeadingElement);
+  check('h2', () => new HeadingElement.h2() is HeadingElement);
+  check('h3', () => new HeadingElement.h3() is HeadingElement);
+  check('h4', () => new HeadingElement.h4() is HeadingElement);
+  check('h5', () => new HeadingElement.h5() is HeadingElement);
+  check('h6', () => new HeadingElement.h6() is HeadingElement);
+  check('iframe', () => new IFrameElement() is IFrameElement);
+  check('img', () => new ImageElement() is ImageElement);
+  check('input', () => new InputElement() is InputElement);
+  check('keygen',
+      () => new KeygenElement() is KeygenElement, KeygenElement.supported);
+}