Support "..." VM frames in pkg/stack_trace.

pkg/stack_trace/test/frame_test.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_test;
 
 import 'package:path/path.dart' as path;
 import 'package:stack_trace/stack_trace.dart';
 import 'package:unittest/unittest.dart';
 
@@ skipping 11 matching lines @@
 
     test('converts "<anonymous closure>" to "<fn>"', () {
       String parsedMember(String member) =>
           new Frame.parseVM('#0 $member (foo:0:0)').member;
 
       expect(parsedMember('Foo.<anonymous closure>'), equals('Foo.<fn>'));
       expect(parsedMember('<anonymous closure>.<anonymous closure>.bar'),
           equals('<fn>.<fn>.bar'));
     });
 
+    test('parses a folded frame correctly', () {
+      var frame = new Frame.parseVM('...');
+
+      expect(frame.member, equals('...'));
+      expect(frame.uri, equals(new Uri()));
+      expect(frame.line, isNull);
+      expect(frame.column, isNull);
+    });
+
     test('throws a FormatException for malformed frames', () {
       expect(() => new Frame.parseVM(''), throwsFormatException);
       expect(() => new Frame.parseVM('#1'), throwsFormatException);
       expect(() => new Frame.parseVM('#1      Foo'), throwsFormatException);
       expect(() => new Frame.parseVM('#1      Foo (dart:async/future.dart)'),
           throwsFormatException);
       expect(() => new Frame.parseVM('#1      Foo (dart:async/future.dart:10)'),
           throwsFormatException);
       expect(() => new Frame.parseVM('#1      (dart:async/future.dart:10:15)'),
           throwsFormatException);
@@ skipping 245 matching lines @@
           equals('http://dartlang.org/thing.dart 5:10 in Foo'));
     });
 
     test('converts "<anonymous closure>" to "<fn>"', () {
       expect(new Frame.parseVM('#0 Foo.<anonymous closure> '
               '(dart:core/uri.dart:5:10)').toString(),
           equals('dart:core/uri.dart 5:10 in Foo.<fn>'));
     });
   });
 }