Fix stack_trace tests on Windows.

R=rnystrom@google.com

Review URL: https://codereview.chromium.org//295323002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/stack_trace@36602 260f80e4-7a28-3924-810f-c04153c831b5

pkgs/stack_trace/test/frame_test.dart

diff --git a/pkgs/stack_trace/test/frame_test.dart b/pkgs/stack_trace/test/frame_test.dart
index bbb905a..b800b0c 100644
--- a/pkgs/stack_trace/test/frame_test.dart
+++ b/pkgs/stack_trace/test/frame_test.dart
@@ -503,7 +503,7 @@
 
     test('returns the relative path for file URIs', () {
       expect(new Frame.parseVM('#0 Foo (foo/bar.dart:0:0)').library,
-          equals('foo/bar.dart'));
+          equals(path.join('foo', 'bar.dart')));
     });
   });
 
@@ -514,7 +514,7 @@
               '(http://dartlang.org/thing.dart:5:10)').location,
           equals('http://dartlang.org/thing.dart 5:10'));
       expect(new Frame.parseVM('#0 Foo (foo/bar.dart:1:2)').location,
-          equals('foo/bar.dart 1:2'));
+          equals('${path.join('foo', 'bar.dart')} 1:2'));
     });
   });
 

pkgs/stack_trace/test/trace_test.dart

diff --git a/pkgs/stack_trace/test/trace_test.dart b/pkgs/stack_trace/test/trace_test.dart
index eeeff28..bc2db6b 100644
--- a/pkgs/stack_trace/test/trace_test.dart
+++ b/pkgs/stack_trace/test/trace_test.dart
@@ -224,7 +224,7 @@
 ''');
 
     expect(trace.toString(), equals('''
-foo/bar.dart 42:21                        Foo._bar
+${path.join('foo', 'bar.dart')} 42:21                        Foo._bar
 dart:async/future.dart 0:2                zip.<fn>.zap
 http://pub.dartlang.org/thing.dart 1:100  zip.<fn>.zap
 '''));