Restructure pkg/unittest and pkg/webdriver to follow the pub conventions.

pkg/intl/test/data_directory.dart

 // Copyright (c) 2012, 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.
 
 /**
  * A utility function for test and tools that compensates (at least for very
  * simple cases) for file-dependent programs being run from different
  * directories.
  */
 library data_directory;
 
 import 'dart:io';
 
 String get _sep => Platform.pathSeparator;
 
 get dataDirectory {
   var current = new Directory.current().path;
   if (new RegExp('.*${_sep}test').hasMatch(current)) {
     return '..${_sep}lib${_sep}src${_sep}data${_sep}dates${_sep}';
   }
   if (new RegExp('.*${_sep}intl').hasMatch(current)) {
     return 'lib${_sep}src${_sep}data${_sep}dates${_sep}';
   }
   return 'pkg${_sep}intl${_sep}lib${_sep}src${_sep}data${_sep}dates${_sep}';
-}
+}