Add service_test GN template

media/mojo/services/BUILD.gn

Index: media/mojo/services/BUILD.gn
diff --git a/media/mojo/services/BUILD.gn b/media/mojo/services/BUILD.gn
index f9e46334d77a059d5b9a930c3e87c14522e290fd..a92031bdc8542acaa982b28a7dc6d7f0cd4bd2ba 100644
--- a/media/mojo/services/BUILD.gn
+++ b/media/mojo/services/BUILD.gn
@@ -6,6 +6,7 @@ import("//media/media_options.gni")
 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")
 
 config("mojo_media_config") {
@@ -162,24 +163,22 @@ service("media") {
 # component builds, so don't declare it, otherwise the "all" target will still
 # try to build it.
 if (!(is_win && is_component_build)) {
-  test("media_service_unittests") {
+  service_test("media_service_unittests") {
     testonly = true
 
     sources = [
       "media_service_unittest.cc",
-      "run_all_unittests.cc",
     ]
 
+    catalog = ":media_service_unittests_catalog"
+
     deps = [
       "//base",
-      "//base/test:test_support",
       "//media",
       "//media/base:test_support",
       "//media/mojo/clients",
       "//media/mojo/common",
       "//media/mojo/interfaces",
-      "//mojo/edk/system",
-      "//services/catalog:lib",
       "//services/service_manager/public/cpp:service_test_support",
       "//testing/gmock",
       "//testing/gtest",
@@ -187,7 +186,6 @@ if (!(is_win && is_component_build)) {
 
     data_deps = [
       ":media",
-      ":media_service_unittests_catalog_copy",
     ]
   }
 }  # !(is_win && is_component_build)
@@ -225,13 +223,3 @@ catalog("media_service_unittests_catalog") {
   embedded_services = [ ":test_manifest" ]
   standalone_services = [ ":media_manifest" ]
 }
-
-copy("media_service_unittests_catalog_copy") {
-  sources = get_target_outputs(":media_service_unittests_catalog")
-  outputs = [
-    "${root_out_dir}/media_service_unittests_catalog.json",
-  ]
-  deps = [
-    ":media_service_unittests_catalog",
-  ]
-}