Setting up benchmarks and perf utilities

test/perf/input/todomvc_common.dart

Index: test/perf/input/todomvc_common.dart
diff --git a/test/perf/input/todomvc_common.dart b/test/perf/input/todomvc_common.dart
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+// Copyright (c) 2011, 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.
+
+
+/** Common functions used by TodoMVC tests. */
+library todomvc_common;
+
+import 'dart:html';
+import 'package:web_ui/watcher.dart';
+
+void markChecked(item) {
+  var node = document.queryAll('input[type=checkbox]')[item + 1];
+  node.on.click.dispatch(new MouseEvent('click', window, 1, 0, 0, 0, 0, 0));
+}
+
+void checkAll() {
+  var node = document.queryAll('input[type=checkbox]')[0];
+  node.on.click.dispatch(new MouseEvent('click', window, 1, 0, 0, 0, 0, 0));
+}
+
+void clearCompleted() {
+  var node = document.query('#clear-completed');
+  node.on.click.dispatch(new MouseEvent('click', window, 1, 0, 0, 0, 0, 0));
+}
+
+var _newTodo = (() => document.query('#new-todo'))();
+var _form = (() => document.query('#__e-0'))();
+
+void addNote(String note) {
+  _newTodo.value = note;
+  _form.on.submit.dispatch(new Event('submit'));
+  dispatch();
+}