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

chrome/browser/profiles/chrome_version_service.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/profiles/chrome_version_service.h"
 
 #include "base/prefs/pref_service.h"
-#include "base/version.h"
 #include "chrome/common/chrome_version_info.h"
 #include "chrome/common/pref_names.h"
 #include "components/user_prefs/pref_registry_syncable.h"
 
 // static
 void ChromeVersionService::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   registry->RegisterStringPref(
       prefs::kProfileCreatedByVersion,
       "1.0.0.0",
@@ skipping 19 matching lines @@
 
   // If this is a new profile set version to current version, otherwise
   // (pre-existing profile), leave pref at default value (1.0.0.0) to
   // avoid any first-run behavior.
   std::string version = version_info.Version();
   if (prefs->FindPreference(prefs::kProfileCreatedByVersion)->
       IsDefaultValue() && is_new_profile) {
     SetVersion(prefs, version);
   }
 }