Add service_test GN template

services/ui/demo/run_all_unittests.cc

Index: services/ui/demo/run_all_unittests.cc
diff --git a/services/ui/demo/run_all_unittests.cc b/services/ui/demo/run_all_unittests.cc
deleted file mode 100644
index 29dc7f8ecefc601c09440f32de6976a8503ff07c..0000000000000000000000000000000000000000
--- a/services/ui/demo/run_all_unittests.cc
+++ /dev/null
@@ -1,39 +0,0 @@
-// 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.
-
-#include "base/files/file_path.h"
-#include "base/logging.h"
-#include "base/message_loop/message_loop.h"
-#include "base/test/launcher/unit_test_launcher.h"
-#include "base/test/test_suite.h"
-#include "base/threading/thread.h"
-#include "mojo/edk/embedder/embedder.h"
-#include "mojo/edk/embedder/scoped_ipc_support.h"
-#include "services/catalog/catalog.h"
-
-namespace {
-
-const base::FilePath::CharType kCatalogFilename[] =
-    FILE_PATH_LITERAL("mus_demo_unittests_catalog.json");
-
-}  // namespace
-
-int main(int argc, char** argv) {
-  base::TestSuite test_suite(argc, argv);
-
-  catalog::Catalog::LoadDefaultCatalogManifest(
-      base::FilePath(kCatalogFilename));
-
-  mojo::edk::Init();
-  base::Thread ipc_thread("IPC thread");
-  ipc_thread.StartWithOptions(
-      base::Thread::Options(base::MessageLoop::TYPE_IO, 0));
-  mojo::edk::ScopedIPCSupport ipc_support(
-      ipc_thread.task_runner(),
-      mojo::edk::ScopedIPCSupport::ShutdownPolicy::CLEAN);
-
-  return base::LaunchUnitTests(
-      argc, argv,
-      base::Bind(&base::TestSuite::Run, base::Unretained(&test_suite)));
-}