Address codereview comments:

pkg/stack_trace/test/frame_test.dart

Index: pkg/stack_trace/test/frame_test.dart
===================================================================
--- pkg/stack_trace/test/frame_test.dart	(revision 27833)
+++ pkg/stack_trace/test/frame_test.dart	(working copy)
@@ -10,7 +10,7 @@
 
 void main() {
   group('.parseVM', () {
-    test('parses a stack frame correctly', () {
+    test('parses a stack frame with column correctly', () {
       var frame = new Frame.parseVM("#1      Foo._bar "
           "(file:///home/nweiz/code/stuff.dart:42:21)");
       expect(frame.uri,
@@ -20,6 +20,16 @@
       expect(frame.member, equals('Foo._bar'));
     });
 
+    test('parses a stack frame without column correctly', () {
+      var frame = new Frame.parseVM("#1      Foo._bar "
+          "(file:///home/nweiz/code/stuff.dart:24)");
+      expect(frame.uri,
+          equals(Uri.parse("file:///home/nweiz/code/stuff.dart")));
+      expect(frame.line, equals(24));
+      expect(frame.column, null);
+      expect(frame.member, equals('Foo._bar'));
+    });
+
     test('converts "<anonymous closure>" to "<fn>"', () {
       String parsedMember(String member) =>
           new Frame.parseVM('#0 $member (foo:0:0)').member;