Update all users of base::Version to explicitly specify the namespace, and clean up the header.

chrome/installer/util/product_state_unittest.cc

 // Copyright (c) 2011 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 <windows.h>
 
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/test_reg_util_win.h"
-#include "base/version.h"
 #include "base/win/registry.h"
 #include "chrome/installer/util/browser_distribution.h"
 #include "chrome/installer/util/google_update_constants.h"
 #include "chrome/installer/util/installation_state.h"
 #include "chrome/installer/util/product_unittest.h"
 #include "chrome/installer/util/util_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using base::win::RegKey;
 using installer::ProductState;
@@ skipping 385 matching lines @@
 
   // Uninstall command with --multi-install is multi install.
   {
     ProductState state;
     ApplyUninstallCommand(L"setup.exe",
                           L"--uninstall --chrome --multi-install");
     EXPECT_TRUE(state.Initialize(system_install_, dist_));
     EXPECT_TRUE(state.is_multi_install());
   }
 }