Misc service_manager and service test cleanup

services/test/BUILD.gn

Index: services/test/BUILD.gn
diff --git a/services/test/BUILD.gn b/services/test/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..bd22d3a1a521dc49d0f337e43d1646c9e5a5504d
--- /dev/null
+++ b/services/test/BUILD.gn
@@ -0,0 +1,17 @@
+# Copyright 2017 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.
+
+source_set("run_all_unittests") {
+  testonly = true
+
+  sources = [
+    "run_all_unittests.cc",
+  ]
+
+  deps = [
+    "//base",
+    "//base/test:test_support",
+    "//mojo/edk/system",
+  ]
+}