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

chrome/installer/util/google_chrome_distribution.h

 // 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 extends generic BrowserDistribution class to declare Google Chrome
 // specific implementation.
 
 #ifndef CHROME_INSTALLER_UTIL_GOOGLE_CHROME_DISTRIBUTION_H_
 #define CHROME_INSTALLER_UTIL_GOOGLE_CHROME_DISTRIBUTION_H_
 
@@ skipping 12 matching lines @@
   // Opens the Google Chrome uninstall survey window.
   // version refers to the version of Chrome being uninstalled.
   // local_data_path is the path of the file containing json metrics that
   //   will be parsed. If this file indicates that the user has opted in to
   //   providing anonymous usage data, then some additional statistics will
   //   be added to the survey url.
   // distribution_data contains Google Update related data that will be
   //   concatenated to the survey url if the file in local_data_path indicates
   //   the user has opted in to providing anonymous usage data.
   void DoPostUninstallOperations(
-      const Version& version,
+      const base::Version& version,
       const base::FilePath& local_data_path,
       const base::string16& distribution_data) override;
 
   base::string16 GetActiveSetupGuid() override;
 
   base::string16 GetShortcutName(ShortcutType shortcut_type) override;
 
   base::string16 GetIconFilename() override;
 
   int GetIconIndex(ShortcutType shortcut_type) override;
@@ skipping 39 matching lines @@
   GoogleChromeDistribution();
 
   explicit GoogleChromeDistribution(
       scoped_ptr<AppRegistrationData> app_reg_data);
 
  private:
   friend class BrowserDistribution;
 };
 
 #endif  // CHROME_INSTALLER_UTIL_GOOGLE_CHROME_DISTRIBUTION_H_