Remove uses of Options from utils directory.

utils/css/tool.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.
 
 library csstool;
 
 import 'dart:io';
 import 'css.dart';
 import '../lib/file_system.dart';
 import '../lib/file_system_vm.dart';
@@ skipping 10 matching lines @@
   return watch.elapsedMilliseconds;
 }
 
 printStats(num elapsed, [String filename = '']) {
   print('Parsed ${_GREEN_COLOR}${filename}${_NO_COLOR} in ${elapsed} msec.');
 }
 
 /**
  * Run from the `utils/css` directory.
  */
-void main() {
-  var optionArgs = new Options().arguments;
+void main(List<String> optionsArgs) {
   assert(optionArgs.length == 2);
 
   String sourceFullFn = optionArgs[0];
   String outputFullFn = optionArgs[1];
 
   String sourcePath;
   String sourceFilename;
   int idxBeforeFilename = sourceFullFn.lastIndexOf('/');
   if (idxBeforeFilename >= 0) {
     sourcePath = sourceFullFn.substring(0, idxBeforeFilename + 1);
@@ skipping 33 matching lines @@
 
     files.writeString(outputFullFn, buff.toString());
     print("Generated file ${outputFullFn}");
 
     // Generate CSS.dart file.
     String genDartClassFile = Generate.dartClass(files, outPath, stylesheet,
         sourceFilename);
     print("Generated file ${genDartClassFile}");
   }
 }