Add configuration information to test.dart output.

tools/testing/dart/test_runner.dart

Index: tools/testing/dart/test_runner.dart
diff --git a/tools/testing/dart/test_runner.dart b/tools/testing/dart/test_runner.dart
index 70b6bd91a7fc9c5c158b80e00ada63e5b2ce4f2e..b2fe009b727e2c6a261e8cd1f456ac8f2b4e7df0 100644
--- a/tools/testing/dart/test_runner.dart
+++ b/tools/testing/dart/test_runner.dart
@@ -76,6 +76,9 @@ class TestCase {
 
   int get timeout() => configuration['timeout'];
 
+  String get configurationString() =>
+      configuration['mode'] + configuration['arch'];

[Mads Ager (google), 2012/01/19 13:05:23]

Sorry, this is a little late, but don't you want a space or underscore or
something between mode and arch:

debug ia32
debug_ia32

?

[Ivan Posva, 2012/01/19 17:04:45]

As the bug reporter all I want is some indication what configuration was running
or taking so much time. To me debug_ia32 is probably a bit more readable. I'll
fix it.

+
   void completed() { completedHandler(this); }
 }