Copy lib/dom tests that use dart:html to lib/html.

tests/dom/typing_test.dart

-#library('TypingTest');
-#import('../../lib/unittest/unittest.dart');
-#import('../../lib/unittest/html_config.dart');
-#import('dart:html');
-
-main() {
-  useHtmlConfiguration();
-
-  test('NodeList', () {
-    List<Node> asList = window.document.queryAll('body');
-    // Check it's Iterable
-    int counter = 0;
-    for (Node node in window.document.queryAll('body')) {
-      counter++;
-    }
-    Expect.equals(1, counter);
-    counter = 0;
-    window.document.queryAll('body').forEach((e) { counter++; });
-    Expect.equals(1, counter);
-  });
-
-  test('StyleSheetList', () {
-    List<StyleSheet> asList = window.document.styleSheets;
-    // Check it's Iterable.
-    int counter = 0;
-    for (StyleSheet styleSheet in window.document.styleSheets) {
-      counter++;
-    }
-
-    // There is one style sheet from the unittest framework.
-    Expect.equals(1, counter);
-  });
-}