Remove the mus_clipboard target and merge it into service_unittests.

services/ui/clipboard/BUILD.gn

 # Copyright 2016 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.
 
 import("//services/catalog/public/tools/catalog.gni")
 import("//services/service_manager/public/cpp/service.gni")
 import("//services/service_manager/public/service_manifest.gni")
 import("//services/service_manager/public/tools/test/service_test.gni")
 import("//testing/test.gni")
 
 source_set("lib") {
   sources = [
     "clipboard_impl.cc",
     "clipboard_impl.h",
   ]
 
   deps = [
     "//base",
     "//mojo/common",
     "//mojo/public/cpp/bindings",
     "//services/service_manager/public/cpp",
     "//services/ui/public/interfaces",
   ]
 }
 
-group("tests") {
+source_set("tests") {
   testonly = true
-  deps = [
-    ":mus_clipboard_unittests",
-  ]
-}
 
-service_test("mus_clipboard_unittests") {
   sources = [
     "clipboard_unittest.cc",
   ]
 
-  catalog = ":mus_clipboard_unittests_catalog"
-
   deps = [
     "//base",
     "//mojo/common",
     "//services/service_manager/public/cpp",
     "//services/service_manager/public/cpp:service_test_support",
     "//services/ui/public/interfaces",
   ]
 
   data_deps = [
     ":lib",
     "//services/ui",
   ]
 }
 
-service_manifest("test_manifest") {
-  name = "mus_clipboard_unittests"
+service_manifest("unittest_manifest") {
+  name = "clipboard_unittests"
   source = "test_manifest.json"
 }
 
-catalog("mus_clipboard_unittests_catalog") {
-  embedded_services = [ ":test_manifest" ]
+catalog("tests_catalog") {
+  testonly = true
+  embedded_services = [ ":unittest_manifest" ]
   standalone_services = [ "//services/ui:manifest" ]
 }