Properly shorten library names on Windows.

lib/src/frame.dart

 // Copyright (c) 2013, 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 frame;
 
-
 import 'package:path/path.dart' as path;
 
 import 'trace.dart';
 
 // #1      Foo._bar (file:///home/nweiz/code/stuff.dart:42:21)
 // #1      Foo._bar (file:///home/nweiz/code/stuff.dart:42)
 // #1      Foo._bar (file:///home/nweiz/code/stuff.dart)
 final _vmFrame = new RegExp(r'^#\d+\s+(\S.*) \((.+?)((?::\d+){0,2})\)$');
 
 //     at VW.call$0 (http://pub.dartlang.org/stuff.dart.js:560:28)
@@ skipping 269 matching lines @@
     // their stack frames. However, if we do get a relative path, we should
     // handle it gracefully.
     if (uriOrPath.contains('\\')) return path.windows.toUri(uriOrPath);
     return Uri.parse(uriOrPath);
   }
 
   Frame(this.uri, this.line, this.column, this.member);
 
   String toString() => '$location in $member';
 }