Find pub status file in right directory.

tools/testing/dart/test_suite.dart

Index: tools/testing/dart/test_suite.dart
diff --git a/tools/testing/dart/test_suite.dart b/tools/testing/dart/test_suite.dart
index d4100d5e4068ac40d6161a7ece6d03024e9f1930..a17fbf773631535997940f712028b6ef6498ac7d 100644
--- a/tools/testing/dart/test_suite.dart
+++ b/tools/testing/dart/test_suite.dart
@@ -636,10 +636,8 @@ class StandardTestSuite extends TestSuite {
    * particular, if you add 'path/to/mytestsuite' to [TEST_SUITE_DIRECTORIES]
    * in test.dart, this will all be set up for you.
    */
-  factory StandardTestSuite.forDirectory(Map configuration, Path directory,
-      [String name]) {
-    if (name == null) name = directory.filename;
-
+  factory StandardTestSuite.forDirectory(Map configuration, Path directory) {
+    var name = directory.filename;
     var status_paths = ['$directory/$name.status',
                         '$directory/.status',
                         '$directory/${name}_dart2js.status',