webui fixes for 0.8.9

lib/src/utils.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.
 
 library web_ui.src.utils;
 
 import 'dart:async';
 
-import 'package:pathos/path.dart' show Builder;
+import 'package:path/path.dart' show Builder;
 
 
 /**
- * An instance of the pathos library builder. We could just use the default
- * builder in pathos, but we add this indirection to make it possible to run
+ * An instance of the path library builder. We could just use the default
+ * builder in path, but we add this indirection to make it possible to run
  * unittest for windows paths.
  */
 Builder path = new Builder();
 
 /** Convert a OS specific path into a url. */
 String pathToUrl(String relPath) =>
   (path.separator == '/') ? relPath : path.split(relPath).join('/');
 
 /**
  * Converts a string name with hyphens into an identifier, by removing hyphens
@@ skipping 112 matching lines @@
     var i = results.length;
     results.add(null);
     task.then((res) {
       results[i] = res;
       if (_failedTask != null) return;
       _pending--;
       if (_pending == 0) {
         _pending = _FINISHED;
         _completer.complete(results);
       }
-    }, onError: (e) {
+    }, onError: (e, trace) {
       if (_failedTask != null) return;
       _failedTask = task;
-      _completer.completeError(e, getAttachedStackTrace(e));
+      _completer.completeError(e, trace);
     });
   }
 
   Future<List> get future => _completer.future;
 }
 
 
 /**
  * Escapes [text] for use in a Dart string.
  * [single] specifies single quote `'` vs double quote `"`.
@@ skipping 119 matching lines @@
  */
 void compilerAssert(bool condition, [String message]) {
   if (!condition) throw new InternalError(message);
 }
 
 // TODO(jmesserly): this is a start, but what we might want to instead: catch
 // all errors at the top level and log to message (including stack). That way if
 // we have a noSuchMethod error or something it will show up the same way as
 // this does, including the bug report link.
 /** Error thrown if there is a bug in the compiler itself. */
-class InternalError implements Error {
+class InternalError extends Error {
   final message;
 
   InternalError([this.message]);
 
   String toString() {
     var additionalMessage = '';
     if (message != null) {
       additionalMessage = '\nInternal message: $message';
     }
     return "We're sorry, you've just found a compiler bug. "
       'You can report it at:\n'
       'https://github.com/dart-lang/web-ui/issues/new\n'
       'Thanks in advance for the bug report! It will help us improve Web UI.'
       '$additionalMessage';
   }
 }