Ensure the services gpu tests run with ozone.

services/test/BUILD.gn

 # 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.
 
+import("//build/config/ui.gni")
+
 source_set("run_all_service_tests") {
   # This target is in a separate directory because we want to expand DEPS so
   # that it not all of //services can access //ui.
   visibility = [ "//services:*" ]
 
   testonly = true
 
   sources = [
     "run_all_service_tests.cc",
   ]
 
   deps = [
     "//base",
     "//base/test:test_support",
     "//services/service_manager/public/cpp/test:common_initialization",
     "//ui/base",
   ]
 
   data_deps = [
     "//ui/resources:ui_test_pak_data",
   ]
 
   if (is_android) {
     deps += [ "//mojo/android:libsystem_java" ]
   }
+
+  if (use_ozone) {
+    deps += [ "//ui/ozone" ]
+  }
 }