webui fixes for 0.8.9

lib/component_build.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.
 
 /**
  * Common logic to make it easy to create a `build.dart` for your project.
  *
  * The `build.dart` script is invoked automatically by the Editor whenever a
  * file in the project changes. It must be placed in the root of a project
  * (where pubspec.yaml lives) and should be named exactly 'build.dart'.
@@ skipping 93 matching lines @@
         tasks.add(lastTask);
       }
     }
     return tasks.future.then((r) => r.where((v) => v != null));
   }, printTime: printTime, useColors: useColors);
 }
 
 String _outDir(String file) => path.join(path.dirname(file), 'out');
 
 /** Tell whether [filePath] is a generated file. */
-bool _isGeneratedFile(String filePath, List<Directory> outputOnlyDirs) {
+bool _isGeneratedFile(String filePath, List<String> outputOnlyDirs) {
   var dirPrefix = path.dirname(filePath);
   for (var outDir in outputOnlyDirs) {
     if (dirPrefix.startsWith(outDir)) return true;
   }
   return path.basename(filePath).startsWith('_');
 }
 
 /** Tell whether [filePath] is an input file. */
 bool _isInputFile(String filePath, List<String> outputOnlyDirs) {
   var ext = path.extension(filePath);
@@ skipping 32 matching lines @@
   if (args["help"]) {
     print('A build script that invokes the web-ui compiler (dwc).');
     print('Usage: dart build.dart [options] [-- [dwc-options]]');
     print('\nThese are valid options expected by build.dart:');
     print(parser.getUsage());
     print('\nThese are valid options expected by dwc:');
     dwc.run(['-h']).then((_) => exit(0));
   }
   return args;
 }