Revert of base: Remove using:: declaration from version.h header.

chrome/browser/chrome_browser_main_win.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/chrome_browser_main_win.h"
 
 #include <windows.h>
 #include <shellapi.h>
 
 #include <algorithm>
@@ skipping 489 matching lines @@
   }
   // We don't hide icons so we shouldn't do anything special to show them
   return chrome::RESULT_CODE_UNSUPPORTED_PARAM;
 }
 
 // static
 bool ChromeBrowserMainPartsWin::CheckMachineLevelInstall() {
   // TODO(tommi): Check if using the default distribution is always the right
   // thing to do.
   BrowserDistribution* dist = BrowserDistribution::GetDistribution();
-  base::Version version;
+  Version version;
   InstallUtil::GetChromeVersion(dist, true, &version);
   if (version.IsValid()) {
     base::FilePath exe_path;
     PathService::Get(base::DIR_EXE, &exe_path);
     std::wstring exe = exe_path.value();
     base::FilePath user_exe_path(installer::GetChromeInstallPath(false, dist));
     if (base::FilePath::CompareEqualIgnoreCase(exe, user_exe_path.value())) {
       bool is_metro = base::win::IsMetroProcess();
       if (!is_metro) {
         // The dialog cannot be shown in Win8 Metro as doing so hangs Chrome on
@@ skipping 65 matching lines @@
   if (resource_id)
     return l10n_util::GetStringUTF16(resource_id);
   return base::string16();
 }
 
 // static
 void ChromeBrowserMainPartsWin::SetupInstallerUtilStrings() {
   CR_DEFINE_STATIC_LOCAL(TranslationDelegate, delegate, ());
   installer::SetTranslationDelegate(&delegate);
 }