Progressively refacto FirstRun class to first_run namespace(part 4).

chrome/browser/first_run/first_run_linux.cc

 // 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.
 
 #include "chrome/browser/first_run/first_run.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/file_util.h"
 #include "base/path_service.h"
@@ skipping 79 matching lines @@
                                      dont_import_items,
                                      search_engine_experiment,
                                      randomize_search_engine_experiment,
                                      make_chrome_default);
 
   process_singleton->Unlock();
   CreateSentinel();
 #endif  // !defined(USE_AURA)
 }
 
-}  // namespace first_run
-
-// static
-FilePath FirstRun::MasterPrefsPath() {
+FilePath MasterPrefsPath() {
   // The standard location of the master prefs is next to the chrome binary.
   FilePath master_prefs;
   if (!PathService::Get(base::DIR_EXE, &master_prefs))
     return FilePath();
   return master_prefs.AppendASCII(installer::kDefaultMasterPrefs);
 }
+
+}  // namespace first_run