dhcp client: add unittest for DeviceInfo

Add unittest for DeviceInfo class.

Fix a comment in main.cc.

Bug: 25642025
TEST=compile and run unittest

Change-Id: Iffd90dc6581aaa3b6f44d5e6c92146275f88ccaf
diff --git a/testrunner.cc b/testrunner.cc
new file mode 100644
index 0000000..e3ad61e
--- /dev/null
+++ b/testrunner.cc
@@ -0,0 +1,28 @@
+//
+// Copyright (C) 2015 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+#include <base/at_exit.h>
+#include <base/command_line.h>
+#include <brillo/syslog_logging.h>
+#include <gtest/gtest.h>
+
+int main(int argc, char** argv) {
+  base::AtExitManager exit_manager;
+  base::CommandLine::Init(argc, argv);
+  brillo::InitLog(brillo::kLogToStderr);
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}