Make callers of CommandLine use it via the base:: namespace.

chrome/browser/prefs/pref_service_syncable_factory.cc

 // Copyright 2013 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/prefs/pref_service_syncable_factory.h"
 
 #include "base/debug/trace_event.h"
 #include "base/prefs/default_pref_store.h"
 #include "base/prefs/pref_notifier_impl.h"
 #include "base/prefs/pref_value_store.h"
@@ skipping 28 matching lines @@
 void PrefServiceSyncableFactory::SetRecommendedPolicies(
     policy::PolicyService* service) {
   set_recommended_prefs(
       new policy::ConfigurationPolicyPrefStore(
           service,
           g_browser_process->browser_policy_connector()->GetHandlerList(),
           policy::POLICY_LEVEL_RECOMMENDED));
 }
 #endif
 
-void PrefServiceSyncableFactory::SetCommandLine(CommandLine* command_line) {
+void PrefServiceSyncableFactory::SetCommandLine(
+    base::CommandLine* command_line) {
   set_command_line_prefs(new CommandLinePrefStore(command_line));
 }
 
 scoped_ptr<PrefServiceSyncable> PrefServiceSyncableFactory::CreateSyncable(
     user_prefs::PrefRegistrySyncable* pref_registry) {
   TRACE_EVENT0("browser", "PrefServiceSyncableFactory::CreateSyncable");
   PrefNotifierImpl* pref_notifier = new PrefNotifierImpl();
   scoped_ptr<PrefServiceSyncable> pref_service(
       new PrefServiceSyncable(
           pref_notifier,
           new PrefValueStore(managed_prefs_.get(),
                              supervised_user_prefs_.get(),
                              extension_prefs_.get(),
                              command_line_prefs_.get(),
                              user_prefs_.get(),
                              recommended_prefs_.get(),
                              pref_registry->defaults().get(),
                              pref_notifier),
           user_prefs_.get(),
           pref_registry,
           read_error_callback_,
           async_));
   return pref_service.Pass();
 }