Roll Observatory packages and add a roll script

packages/html/test/run_all.dart

+#!/usr/bin/env 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.
+
+library test.run_all;
+
+import 'package:unittest/compact_vm_config.dart';
+import 'package:unittest/unittest.dart';
+
+import 'dom_test.dart' as dom_test;
+import 'parser_feature_test.dart' as parser_feature_test;
+import 'parser_test.dart' as parser_test;
+import 'tokenizer_test.dart' as tokenizer_test;
+
+main(List<String> args) {
+  var pattern = new RegExp(args.length > 0 ? args[0] : '.');
+  useCompactVMConfiguration();
+
+  void addGroup(testFile, testMain) {
+    if (pattern.hasMatch(testFile)) {
+      group(testFile.replaceAll('_test.dart', ':'), testMain);
+    }
+  }
+
+  addGroup('dom_test.dart', dom_test.main);
+  addGroup('parser_feature_test.dart', parser_feature_test.main);
+  addGroup('parser_test.dart', parser_test.main);
+  addGroup('tokenizer_test.dart', tokenizer_test.main);
+}