Replace recipes_test.py with a new parallel expectation-based test runner.

scripts/slave/unittests/expect_tests/handle_list.py

Index: scripts/slave/unittests/expect_tests/handle_list.py
diff --git a/scripts/slave/unittests/expect_tests/handle_list.py b/scripts/slave/unittests/expect_tests/handle_list.py
new file mode 100644
index 0000000000000000000000000000000000000000..2fdea5eafd32902a653e1fbb2784fe2aa6a89a89
--- /dev/null
+++ b/scripts/slave/unittests/expect_tests/handle_list.py
@@ -0,0 +1,18 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+from .types import Handler
+
+
+class ListHandler(Handler):
+  """List all of the tests instead of running them."""
+  SKIP_RUNLOOP = True
+
+  class ResultStageHandler(Handler.ResultStageHandler):
+    @staticmethod
+    def handle_Test(test):
+      print test.name
+
+    # TODO(iannucci): group tests by dir?
+    # TODO(iannucci): print more data about the test in verbose mode?