Add service_test GN template

components/leveldb/BUILD.gn

Index: components/leveldb/BUILD.gn
diff --git a/components/leveldb/BUILD.gn b/components/leveldb/BUILD.gn
index 5930be901afad6b06844cce875706b8d421a14cd..ed49e2a56c7616b4b0aad00b85d76337644d4d11 100644
--- a/components/leveldb/BUILD.gn
+++ b/components/leveldb/BUILD.gn
@@ -5,6 +5,7 @@
 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")
 
 static_library("lib") {
@@ -60,24 +61,22 @@ service_manifest("manifest") {
   source = "manifest.json"
 }
 
-test("leveldb_service_unittests") {
+service_test("leveldb_service_unittests") {
   sources = [
     "leveldb_service_unittest.cc",
     "remote_iterator_unittest.cc",
-    "run_all_unittests.cc",
   ]
 
+  catalog = ":leveldb_service_unittests_catalog"
+
   deps = [
     "//base",
-    "//base/test:test_support",
     "//components/filesystem/public/interfaces",
     "//components/leveldb/public/cpp",
     "//components/leveldb/public/interfaces",
     "//mojo/common",
-    "//mojo/edk/system",
     "//mojo/public/cpp/bindings",
     "//mojo/public/cpp/system",
-    "//services/catalog:lib",
     "//services/service_manager/public/cpp:service_test_support",
     "//services/service_manager/public/cpp:sources",
     "//third_party/leveldatabase",
@@ -85,7 +84,6 @@ test("leveldb_service_unittests") {
 
   data_deps = [
     ":leveldb",
-    ":leveldb_service_unittests_catalog_copy",
     "//components/filesystem:filesystem",
   ]
 }
@@ -102,13 +100,3 @@ catalog("leveldb_service_unittests_catalog") {
     "//components/filesystem:manifest",
   ]
 }
-
-copy("leveldb_service_unittests_catalog_copy") {
-  sources = get_target_outputs(":leveldb_service_unittests_catalog")
-  outputs = [
-    "${root_out_dir}/leveldb_service_unittests_catalog.json",
-  ]
-  deps = [
-    ":leveldb_service_unittests_catalog",
-  ]
-}