Add again the *necessary* timeout markers for tests running on ie9/ie10

dart/tools/test.dart

Index: dart/tools/test.dart
diff --git a/dart/tools/test.dart b/dart/tools/test.dart
index acd42b7f6d513769a98de6fd98830c4590ab9731..3f65cd42da3f7ffebd544c9b2b32707281934547 100755
--- a/dart/tools/test.dart
+++ b/dart/tools/test.dart
@@ -159,7 +159,6 @@ void testConfigurations(List<Map> configurations) {
       // underlying issue has not been determined yet. Our current hypothesis
       // is that windows makes bad scheduling decisions if we overload a
       // machine (i.e. some processes seem to starve).
-      maxProcesses = math.max(1, maxProcesses-2);
       maxBrowserProcesses = 1;
     } else if (conf['runtime'].startsWith('safari') &&
                conf['use_browser_controller']) {