Upload new Dart binaries and re-enable unit tests for test scripts.

tools/release/version.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.
 
 /**
  * This file contains functionality for getting dart version numbers using
  * our standard version construction method. Systems that does not include this
  * file should emulate the structure for revision numbers that we have here.
  *
  * The version number of a dart build is constructed as follows:
@@ skipping 141 matching lines @@
     }
     var isSvn = repositoryType == RepositoryType.SVN;
     var command = isSvn ? "svn" : "git";
     command = "$command${getExecutableSuffix()}";
     var arguments = isSvn ? ["info"] : ["svn", "info"];
     ProcessOptions options = new ProcessOptions();
     // Run the command from the root to get the last changed revision for this
     // "branch". Since we have both trunk and bleeding edge in the same
     // repository and since we always build TOT we need this to get the
     // right version number.
-    Path toolsDirectory = new Path.fromNative(_versionFileName).directoryPath;
+    Path toolsDirectory = new Path(_versionFileName).directoryPath;
     Path root = toolsDirectory.join(new Path(".."));
     options.workingDirectory = root.toNativePath();
     return Process.run(command, arguments, options).then((result) {
       if (result.exitCode != 0) {
         return 0;
       }
       return getRevisionFromSvnInfo(result.stdout);
     });
   }
 
   bool isProductionBuild(String username) {
     return username == "chrome-bot";
   }
 
   String getUserName() {
     // TODO(ricow): Don't add this on the buildbot.
     var key = "USER";
     if (Platform.operatingSystem == 'windows') {
       key = "USERNAME";
     }
     if (!Platform.environment.containsKey(key)) return "";
     var username = Platform.environment[key];
     // If this is a production build, i.e., this is something we are shipping,
     // don't suffix  the version with the username.
     if (isProductionBuild(username)) return "";
     return username;
   }
 
   bool isGitRepository() {
-    var currentPath = new Path.fromNative(new Directory.current().path);
+    var currentPath = new Path(new Directory.current().path);
     while (!new Directory.fromPath(currentPath.append(".git")).existsSync()) {
       currentPath = currentPath.directoryPath;
       if (currentPath.toString() == "/") {
         break;
       }
     }
     return new Directory.fromPath(currentPath.append(".git")).existsSync();
   }
 
   RepositoryType get repositoryType {
@@ skipping 13 matching lines @@
   static RepositoryType guessType() {
     if (new Directory(".svn").existsSync()) return RepositoryType.SVN;
     if (new Directory(".git").existsSync()) return RepositoryType.GIT;
     return RepositoryType.UNKNOWN;
   }
 
   String toString() => name;
 
   final String name;
 }