Pub integration tests sometimes need more than 20 seconds.

dart/sdk/lib/_internal/pub/test/test_pub.dart

Index: dart/sdk/lib/_internal/pub/test/test_pub.dart
diff --git a/dart/sdk/lib/_internal/pub/test/test_pub.dart b/dart/sdk/lib/_internal/pub/test/test_pub.dart
index 7b631842f78ff128ebdb1dee2bdfe2190fbe5da6..c06e41a329c6c16f3cc222301d1ad093b93a531f 100644
--- a/dart/sdk/lib/_internal/pub/test/test_pub.dart
+++ b/dart/sdk/lib/_internal/pub/test/test_pub.dart
@@ -39,6 +39,7 @@ import 'descriptor.dart' as d;
 initConfig() {
   useCompactVMConfiguration();
   filterStacks = true;
+  unittestConfiguration.timeout = const Duration(seconds: 60);

[kustermann, 2013/09/03 07:32:38]

That's not the best thing to do. If this test is really timing out, the result
of the test can sometimes be 'FAIL' (if this timer fires first) or 'TIMEOUT' (if
the timer of test.dart fires first).
(i.e. due to the fact that test.dart is also using a 60 second timeout).

There are two alternatives:
- making an opt-out solutions and using it here
- lowering the timeout to 30-45 seconds

A hackisch way of 'opt-out' would be:
  unittestConfiguration.timeout = const Duration(hours: 24)

 }
 
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