Frog changes (in experimental) to get frog integrated into the test infrastructure.

world.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.
 
 /** The one true [World]. */
 World world;
 
 /**
  * Should be called exactly once to setup singleton world.
  * Can use world.reset() to reinitialize.
  */
 void initializeWorld(FileSystem files) {
   assert(world == null);
   world = new World(files);
   world.init();
 }
 
 /**
  * Compiles the [target] dart file using the given [corelib].
  */
 bool compile(String homedir, List<String> args, FileSystem files) {
-  parseOptions(homedir, args);
+  parseOptions(homedir, args, files);
   initializeWorld(files);
 
   var success = world.compile();
   if (options.outfile != null) {
     if (success) {
       var code = world.getGeneratedCode();
       if (!options.outfile.endsWith('.js')) {
         // Add in #! to invoke node.js on files with non-js extensions
         code = '#!/usr/bin/env node\n' + code;
       }
@@ skipping 388 matching lines @@
 
   withTiming(String name, f()) {
     final sw = new StopWatch();
     sw.start();
     var result = f();
     sw.stop();
     info('$name in ${sw.elapsedInMs()}msec');
     return result;
   }
 }