Changing linux platform for chromeos.

chrome/browser/platform_util.h

 // Copyright (c) 2009 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 CHROME_COMMON_PLATFORM_UTIL_H_
-#define CHROME_COMMON_PLATFORM_UTIL_H_
+#ifndef CHROME_BROWSER_PLATFORM_UTIL_H_
+#define CHROME_BROWSER_PLATFORM_UTIL_H_
 
 #include "base/string16.h"
 #include "gfx/native_widget_types.h"
 
 class FilePath;
 class GURL;
 
 namespace platform_util {
 
 // Show the given file in a file manager. If possible, select the file.
@@ skipping 24 matching lines @@
                     const string16& title,
                     const string16& message);
 
 // Return a human readable modifier for the version string.  For a
 // branded Chrome (not Chromium), this modifier is the channel (dev,
 // beta, stable).
 string16 GetVersionStringModifier();
 
 }
 
-#endif  // CHROME_COMMON_PLATFORM_UTIL_H_
+#endif  // CHROME_BROWSER_PLATFORM_UTIL_H_