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

chrome/installer/util/google_chrome_distribution_dummy.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 dummy implementation of several functions from the
 // BrowserDistribution class for Google Chrome. These functions allow 64-bit
 // Windows Chrome binary to build successfully. Since this binary is only used
 // for Native Client support, most of the install/uninstall functionality is not
 // necessary there.
 
 #include "chrome/installer/util/google_chrome_distribution.h"
 
 #include <windows.h>
 
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/values.h"
 
 GoogleChromeDistribution::GoogleChromeDistribution()
     : BrowserDistribution(CHROME_BROWSER) {
 }
 
 void GoogleChromeDistribution::DoPostUninstallOperations(
-    const Version& version,
+    const base::Version& version,
     const base::FilePath& local_data_path,
     const base::string16& distribution_data) {
 }
 
 base::string16 GoogleChromeDistribution::GetActiveSetupGuid() {
   NOTREACHED();
   return base::string16();
 }
 
 base::string16 GoogleChromeDistribution::GetAppGuid() {
@@ skipping 116 matching lines @@
 
 bool GoogleChromeDistribution::ShouldSetExperimentLabels() {
   NOTREACHED();
   return false;
 }
 
 bool GoogleChromeDistribution::HasUserExperiments() {
   NOTREACHED();
   return false;
 }