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

chrome/browser/ui/webui/chromeos/login/reset_screen_handler.cc

Index: chrome/browser/ui/webui/chromeos/login/reset_screen_handler.cc
diff --git a/chrome/browser/ui/webui/chromeos/login/reset_screen_handler.cc b/chrome/browser/ui/webui/chromeos/login/reset_screen_handler.cc
index 49717568c124765f5786eddf0460251c45c14d6f..75cf4e44da73acb458f20fd3f12827c937444bcb 100644
--- a/chrome/browser/ui/webui/chromeos/login/reset_screen_handler.cc
+++ b/chrome/browser/ui/webui/chromeos/login/reset_screen_handler.cc
@@ -93,7 +93,7 @@ void ResetScreenHandler::Show() {
 
 void ResetScreenHandler::ChooseAndApplyShowScenario() {
   PrefService* prefs = g_browser_process->local_state();
-  restart_required_ = !CommandLine::ForCurrentProcess()->HasSwitch(
+  restart_required_ = !base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kFirstExecAfterBoot);
 
   reboot_was_requested_ = false;
@@ -101,7 +101,7 @@ void ResetScreenHandler::ChooseAndApplyShowScenario() {
   if (!restart_required_)  // First exec after boot.
     reboot_was_requested_ = prefs->GetBoolean(prefs::kFactoryResetRequested);
 
-  if (CommandLine::ForCurrentProcess()->HasSwitch(
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableRollbackOption)) {
     rollback_available_ = false;
     ShowWithParams();