Make the stack_trace package print relative URLs for browser paths.

pkg/path/lib/path.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.
 
 /// A comprehensive, cross-platform path manipulation library.
 ///
 /// ## Installing ##
 ///
 /// Use [pub][] to install this package. Add the following to your
 /// `pubspec.yaml` file.
@@ skipping 61 matching lines @@
 /// An internal context for the current OS so we can provide a straight
 /// functional interface and not require users to create one.
 Context get _context {
   if (_cachedContext != null && Uri.base == _lastBaseUri) return _cachedContext;
   _lastBaseUri = Uri.base;
   _cachedContext = new Context();
   return _cachedContext;
 }
 Context _cachedContext;
 
+/// Returns the [Style] of the current context.
+///
+/// This is the style that all top-level path functions will use.
+Style get style => _context.style;
+
 /// Gets the path to the current working directory.
 ///
 /// In the browser, this means the current URL, without the last file segment.
 String get current {
   var uri = Uri.base;
   if (Style.platform == Style.url) {
     return uri.resolve('.').toString();
   } else {
     var path = uri.toFilePath();
     // Remove trailing '/' or '\'.
@@ skipping 258 matching lines @@
 ///
 ///     // URL
 ///     path.toUri('http://dartlang.org/path/to/foo')
 ///       // -> Uri.parse('http://dartlang.org/path/to/foo')
 ///
 /// If [path] is relative, a relative URI will be returned.
 ///
 ///     path.toUri('path/to/foo')
 ///       // -> Uri.parse('path/to/foo')
 Uri toUri(String path) => _context.toUri(path);