Cleanup: Fix base header include guards.

base/base_paths_win.h

 // Copyright (c) 2012 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.
 
-#ifndef BASE_BASE_PATHS_WIN_H__
-#define BASE_BASE_PATHS_WIN_H__
+#ifndef BASE_BASE_PATHS_WIN_H_
+#define BASE_BASE_PATHS_WIN_H_
 
 // This file declares windows-specific path keys for the base module.
 // These can be used with the PathService to access various special
 // directories and files.
 
 namespace base {
 
 enum {
   PATH_WIN_START = 100,
 
@@ skipping 27 matching lines @@
   DIR_USER_QUICK_LAUNCH,  // Directory for the quick launch shortcuts.
   DIR_TASKBAR_PINS,       // Directory for the shortcuts pinned to taskbar via
                           // base::win::TaskbarPinShortcutLink().
   DIR_WINDOWS_FONTS,      // Usually C:\Windows\Fonts.
 
   PATH_WIN_END
 };
 
 }  // namespace base
 
-#endif  // BASE_BASE_PATHS_WIN_H__
+#endif  // BASE_BASE_PATHS_WIN_H_