Revert 69165 - Merge the installer, installer_util and setup_util namespaces ...

chrome/installer/setup/setup_util.cc

 // Copyright (c) 2010 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.
 
 #include "chrome/installer/setup/setup_util.h"
 
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "chrome/installer/util/master_preferences.h"
 #include "chrome/installer/util/util_constants.h"
 #include "courgette/courgette.h"
 #include "third_party/bspatch/mbspatch.h"
 
-int installer::ApplyDiffPatch(const FilePath& src,
+int setup_util::ApplyDiffPatch(const FilePath& src,
                                const FilePath& patch,
                                const FilePath& dest) {
   VLOG(1) << "Applying patch " << patch.value() << " to file " << src.value()
           << " and generating file " << dest.value();
 
   // Try Courgette first.  Courgette checks the patch file first and fails
   // quickly if the patch file does not have a valid Courgette header.
   courgette::Status patch_status =
       courgette::ApplyEnsemblePatch(src.value().c_str(),
                                     patch.value().c_str(),
                                     dest.value().c_str());
   if (patch_status == courgette::C_OK)
     return 0;
 
   VLOG(1) << "Failed to apply patch " << patch.value() << " using courgette.";
   return ApplyBinaryPatch(src.value().c_str(), patch.value().c_str(),
                           dest.value().c_str());
 }
 
-installer::Version* installer::GetVersionFromArchiveDir(
+installer::Version* setup_util::GetVersionFromArchiveDir(
     const FilePath& chrome_path) {
   VLOG(1) << "Looking for Chrome version folder under " << chrome_path.value();
   FilePath root_path = chrome_path.Append(L"*");
 
   // TODO(tommi): The version directory really should match the version of
   // setup.exe.  To begin with, we should at least DCHECK that that's true.
 
   // TODO(tommi): use file_util::FileEnumerator.
   WIN32_FIND_DATA find_data = {0};
   HANDLE file_handle = FindFirstFile(root_path.value().c_str(), &find_data);
@@ skipping 10 matching lines @@
       version = installer::Version::GetVersionFromString(find_data.cFileName);
       if (version)
         break;
     }
     ret = FindNextFile(file_handle, &find_data);
   }
   FindClose(file_handle);
 
   return version;
 }