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

chrome/browser/ui/ash/session_state_delegate_chromeos.cc

Index: chrome/browser/ui/ash/session_state_delegate_chromeos.cc
diff --git a/chrome/browser/ui/ash/session_state_delegate_chromeos.cc b/chrome/browser/ui/ash/session_state_delegate_chromeos.cc
index dafd512230d4893874b6b03e11b872e0231aeaac..9b1edd275b5fe1d6da7d3ddc9f3727a3eb772e2f 100644
--- a/chrome/browser/ui/ash/session_state_delegate_chromeos.cc
+++ b/chrome/browser/ui/ash/session_state_delegate_chromeos.cc
@@ -140,8 +140,8 @@ void SessionStateDelegateChromeos::UnlockScreen() {
 }
 
 bool SessionStateDelegateChromeos::IsUserSessionBlocked() const {
-  bool has_login_manager = CommandLine::ForCurrentProcess()->HasSwitch(
-          chromeos::switches::kLoginManager);
+  bool has_login_manager = base::CommandLine::ForCurrentProcess()->HasSwitch(
+      chromeos::switches::kLoginManager);
   return (has_login_manager && !IsActiveUserSessionStarted()) ||
          IsScreenLocked() ||
          chromeos::UserAddingScreen::Get()->IsRunning();