Increase timeout to see if "timeout" errors on Windows bot goes away. Otherwise,

tools/testing/dart/test_options.dart

Index: tools/testing/dart/test_options.dart
===================================================================
--- tools/testing/dart/test_options.dart	(revision 13980)
+++ tools/testing/dart/test_options.dart	(working copy)
@@ -563,7 +563,9 @@
           if (Contains(configuration['runtime'],
                        const ['ie9', 'ie10', 'ff', 'chrome', 'safari',
                               'opera'])) {
-            timeout *= 8; // Allow additional time for browser testing to run.
+            // TODO(ahe): Restore the timeout to 8 times the original timeout

[Jennifer Messerly, 2012/10/23 21:05:55]

might want to leave this TODO(efortuna)? (not that you'll be the one that fixes
it -- just that you can explain it). I dunno how Peter feels about having his
name added to TODOs, if ya'll have done this before, it's fine with me :)

+            // when dart2js compile-time performance has improved.
+            timeout *= 12; // Allow additional time for browser testing to run.
           }
           break;
         default: