Remove the mus_clipboard target and merge it into service_unittests.

services/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("//build/config/ui.gni")
 import("//services/catalog/public/tools/catalog.gni")
 import("//services/service_manager/public/tools/test/service_test.gni")
 import("//testing/test.gni")
 
 # One Big Target for services to register their unit test sources. This exists
 # to avoid having to maintain a separate test binary for every service.
 #
 # To add tests for a new service, please define a "tests" source_set in the
 # service subdirectory and add it as a dependency here. If your unit tests
 # use the ServiceTest framework, you must also include corresponding catalog
 # entries in the "service_unittests_catalog" target below.
 service_test("service_unittests") {
   deps = [
     "//services/data_decoder:tests",
     "//services/device:tests",
     "//services/identity:tests",
     "//services/preferences:tests",
     "//services/resource_coordinator:tests",
     "//services/shape_detection:tests",
   ]
 
+  if (use_aura) {
+    deps += [ "//services/ui/clipboard:tests" ]
+  }
+
   if (is_android) {
     deps += [
       "//services/device:java",
 
       # Some tests need to initialize V8.
       "//v8:v8_external_startup_data_assets",
     ]
   } else {
     # NOTE: We do not currently support standalone service binaries on Android,
     # so any tests which use the ServiceTest framework to connect to standalone
     # services must be added here.
     deps += [ "//services/video_capture:tests" ]
   }
 
   catalog = ":service_unittests_catalog"
 }
 
 catalog("service_unittests_catalog") {
   testonly = true
   catalog_deps = [
     "//services/device:tests_catalog",
     "//services/identity:tests_catalog",
     "//services/preferences:tests_catalog",
     "//services/video_capture:tests_catalog",
   ]
+
+  if (use_aura) {
+    catalog_deps += [ "//services/ui/clipboard:tests_catalog" ]
+  }
 }
 
 if (is_android) {
   junit_binary("service_junit_tests") {
     java_files = [ "device/generic_sensor/android/junit/src/org/chromium/device/sensors/PlatformSensorAndProviderTest.java" ]
     deps = [
       "//base:base_java",
       "//base:base_java_test_support",
       "//device/generic_sensor:java",
       "//device/generic_sensor/public/interfaces:interfaces_java",
       "//mojo/public/java:bindings_java",
       "//third_party/android_tools:android_support_annotations_java",
     ]
   }
 }