Make KeyboardEvent cross-browser consistent.

tests/html/keyboard_event_test.dart

+library KeyboardEventTest;
+import '../../pkg/unittest/lib/unittest.dart';
+import '../../pkg/unittest/lib/html_config.dart';
+import 'dart:html';
+
+// Test that we are correctly determining keyCode and charCode uniformly across
+// browsers.
+
+main() {
+
+  useHtmlConfiguration();

[Emily Fortuna, 2012/11/28 22:58:12]

again, not a real test. more for user testing than anything else. I'll remove
this from the CL before committing.

+
+  keydownHandlerTest(KeyEvent e) {
+    print('keycode ${e.keyCode}');
+    print('charcode ${e.charCode}');
+    //expect(e.charCode, 0);
+    //expect(e.keyCode, 0);
+  }
+
+  test('keys', () {
+    var controller = new KeyboardEventController.keydown(document.window);
+    controller.add(keydownHandlerTest);
+    document.window.on.keyDown.add((e) => print('regular listener'), false);
+  });
+}
+
+