Merge the installer, installer_util and setup_util namespaces into a single i...

chrome/installer/setup/setup_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.
 //
 // This file declares util functions for setup project.
 
 #ifndef CHROME_INSTALLER_SETUP_SETUP_UTIL_H_
 #define CHROME_INSTALLER_SETUP_SETUP_UTIL_H_
 #pragma once
 
 #include "chrome/installer/util/version.h"
 
 class FilePath;
 
-namespace setup_util {
+namespace installer {
   // Apply a diff patch to source file. First tries to apply it using courgette
   // since it checks for courgette header and fails quickly. If that fails
   // tries to apply the patch using regular bsdiff. Returns status code.
   int ApplyDiffPatch(const FilePath& src,
                      const FilePath& patch,
                      const FilePath& dest);
 
   // Find the version of Chrome from an install source directory.
   // Chrome_path should contain a version folder.
   // Returns the first version found or NULL if no version is found.
   installer::Version* GetVersionFromArchiveDir(const FilePath& chrome_path);
-}  // namespace setup_util
+}  // namespace installer
 
 #endif  // CHROME_INSTALLER_SETUP_SETUP_UTIL_H_