dbus: Run dbus_unittests parallelly

After http://crrev.com/367499, it should be safe to run dbus_unittests parallelly.

BUG=571274
TEST=dbus_unittests

Review URL: https://codereview.chromium.org/1554403002

Cr-Commit-Position: refs/heads/master@{#367559}

dbus/BUILD.gn

@@ -90,7 +90,6 @@ test("dbus_unittests") {
     "object_manager_unittest.cc",
     "object_proxy_unittest.cc",
     "property_unittest.cc",
-    "run_all_unittests.cc",
     "signal_sender_verification_unittest.cc",
     "string_util_unittest.cc",
     "test_service.cc",
@@ -103,6 +102,7 @@ test("dbus_unittests") {
     ":dbus",
     ":test_proto",
     ":test_support",
+    "//base/test:run_all_unittests",
     "//base/test:test_support",
     "//testing/gmock",
     "//testing/gtest",

dbus/dbus.gyp

@@ -89,6 +89,7 @@
       'target_name': 'dbus_unittests',
       'type': 'executable',
       'dependencies': [
+        '../base/base.gyp:run_all_unittests',
         '../base/base.gyp:test_support_base',
         '../build/linux/system.gyp:dbus',
         '../testing/gmock.gyp:gmock',
@@ -107,7 +108,6 @@
         'object_manager_unittest.cc',
         'object_proxy_unittest.cc',
         'property_unittest.cc',
-        'run_all_unittests.cc',
         'signal_sender_verification_unittest.cc',
         'string_util_unittest.cc',
         'test_service.cc',

dbus/run_all_unittests.cc

-// Copyright 2013 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/bind.h"
-#include "base/test/launcher/unit_test_launcher.h"
-#include "base/test/test_suite.h"
-
-int main(int argc, char** argv) {
-  base::TestSuite test_suite(argc, argv);
-  return base::LaunchUnitTestsSerially(
-      argc, argv,
-      base::Bind(&base::TestSuite::Run, base::Unretained(&test_suite)));
-}