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

chrome/installer/setup/uninstall.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.
 //
 // This file defines the methods useful for uninstalling Chrome.
 
 #include "chrome/installer/setup/uninstall.h"
 
 #include <windows.h>
 
@@ skipping 138 matching lines @@
                                    update_list.get());
     bool success = update_list->Do();
     LOG_IF(ERROR, !success) << "Failed updating channel values.";
   }
 }
 
 void ProcessOnOsUpgradeWorkItems(const InstallerState& installer_state,
                                  const Product& product) {
   scoped_ptr<WorkItemList> work_item_list(
       WorkItem::CreateNoRollbackWorkItemList());
-  AddOsUpgradeWorkItems(installer_state, base::FilePath(), base::Version(),
-                        product, work_item_list.get());
+  AddOsUpgradeWorkItems(installer_state, base::FilePath(), Version(), product,
+                        work_item_list.get());
   if (!work_item_list->Do())
     LOG(ERROR) << "Failed to remove on-os-upgrade command.";
 }
 
 void ProcessIELowRightsPolicyWorkItems(const InstallerState& installer_state) {
   scoped_ptr<WorkItemList> work_items(WorkItem::CreateNoRollbackWorkItemList());
   AddDeleteOldIELowRightsPolicyWorkItems(installer_state, work_items.get());
   work_items->Do();
   RefreshElevationPolicy();
 }
@@ skipping 520 matching lines @@
   }
 }
 
 // Builds and executes a work item list to remove DelegateExecute verb handler
 // work items for |product|.  This will be a noop for products whose
 // corresponding BrowserDistribution implementations do not publish a CLSID via
 // GetCommandExecuteImplClsid.
 bool ProcessDelegateExecuteWorkItems(const InstallerState& installer_state,
                                      const Product& product) {
   scoped_ptr<WorkItemList> item_list(WorkItem::CreateNoRollbackWorkItemList());
-  AddDelegateExecuteWorkItems(installer_state, base::FilePath(),
-                              base::Version(), product, item_list.get());
+  AddDelegateExecuteWorkItems(installer_state, base::FilePath(), Version(),
+                              product, item_list.get());
   return item_list->Do();
 }
 
 // Removes Active Setup entries from the registry. This cannot be done through
 // a work items list as usual because of different paths based on conditionals,
 // but otherwise respects the no rollback/best effort uninstall mentality.
 // This will only apply for system-level installs of Chrome/Chromium and will be
 // a no-op for all other types of installs.
 void UninstallActiveSetupEntries(const InstallerState& installer_state,
                                  const Product& product) {
@@ skipping 706 matching lines @@
     // If we need a reboot to continue, schedule the parent directories for
     // deletion unconditionally. If they are not empty, the session manager
     // will not delete them on reboot.
     ScheduleParentAndGrandparentForDeletion(target_path);
   } else if (DeleteChromeDirectoriesIfEmpty(target_path) == DELETE_FAILED) {
     *uninstall_status = UNINSTALL_FAILED;
   }
 }
 
 }  // namespace installer