Make CEF compliant with Google/Chromium style (issue #473).

- Add a new check_style tool based on Google's cpplint that can be used to verify compliance of pending changes and specific files/directories.
- Update existing CEF source code to be compliant with the style requirements.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@463 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

libcef/cef_time_util.h

@@ -2,8 +2,9 @@
 // reserved. Use of this source code is governed by a BSD-style license that
 // can be found in the LICENSE file.
 
-#ifndef _CEF_TIME_UTIL_H
-#define _CEF_TIME_UTIL_H
+#ifndef CEF_LIBCEF_CEF_TIME_UTIL_H_
+#define CEF_LIBCEF_CEF_TIME_UTIL_H_
+#pragma once
 
 #include "include/internal/cef_time.h"
 #include "base/time.h"
@@ -12,4 +13,4 @@
 void cef_time_to_basetime(const cef_time_t& cef_time, base::Time& time);
 void cef_time_from_basetime(const base::Time& time, cef_time_t& cef_time);
 
-#endif // _CEF_TIME_UTIL_H
+#endif  // CEF_LIBCEF_CEF_TIME_UTIL_H_