Package-ify Dromaeo and browser controller functionality

samples/third_party/dromaeo/web/common/BenchUtil.dart

 // 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.
 
 part of common;
 
 // Misc benchmark-related utility functions.
 
 class BenchUtil {
   static int get now {
@@ skipping 64 matching lines @@
     for (Match match in new RegExp(pattern).allMatches(s)) {
       sb.write(s.substring(pos, match.start));
       sb.write(replacement(match));
       pos = match.end;
     }
     sb.write(s.substring(pos));
 
     return sb.toString();
   }
 }