Support Safari 6.1's new stack trace format in pkg/stack_trace.

pkg/stack_trace/test/trace_test.dart

Index: pkg/stack_trace/test/trace_test.dart
diff --git a/pkg/stack_trace/test/trace_test.dart b/pkg/stack_trace/test/trace_test.dart
index c3ce03906ae466d04efa02f6d5c6750376300ec2..ad916f156d8d04c32d0133f4cadd10dae073eaac 100644
--- a/pkg/stack_trace/test/trace_test.dart
+++ b/pkg/stack_trace/test/trace_test.dart
@@ -130,7 +130,7 @@ void main() {
           equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
     });
 
-    test('.parseSafari', () {
+    test('parses a Safari 6.0 stack trace correctly', () {
       var trace = new Trace.parse(
           'Foo._bar@http://pub.dartlang.org/stuff.js:42\n'
           'zip/<@http://pub.dartlang.org/stuff.js:0\n'
@@ -146,6 +146,20 @@ void main() {
       expect(trace.frames.length, equals(3));
     });
 
+    test('parses a Safari 6.1 stack trace correctly', () {
+      var trace = new Trace.parse(
+          'http://pub.dartlang.org/stuff.js:42:43\n'
+          'zip@http://pub.dartlang.org/stuff.js:0:1\n'
+          'zip\$zap@http://pub.dartlang.org/thing.js:1:2');
+
+      expect(trace.frames[0].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[1].uri,
+          equals(Uri.parse("http://pub.dartlang.org/stuff.js")));
+      expect(trace.frames[2].uri,
+          equals(Uri.parse("http://pub.dartlang.org/thing.js")));
+    });
+
     test('parses a package:stack_trace stack trace correctly', () {
       var trace = new Trace.parse(
           'http://dartlang.org/foo/bar.dart 10:11  Foo.<fn>.bar\n'