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

chrome/browser/ui/webui/chromeos/login/gaia_screen_handler.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/ui/webui/chromeos/login/gaia_screen_handler.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_service.h"
@@ skipping 194 matching lines @@
         "stringEmptyEmail",
         l10n_util::GetStringUTF16(IDS_LOGIN_OFFLINE_EMPTY_EMAIL));
     localized_strings->SetString(
         "stringEmptyPassword",
         l10n_util::GetStringUTF16(IDS_LOGIN_OFFLINE_EMPTY_PASSWORD));
     localized_strings->SetString(
         "stringError", l10n_util::GetStringUTF16(IDS_LOGIN_OFFLINE_ERROR));
     params.Set("localizedStrings", localized_strings);
   }
 
-  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
 
   const GURL gaia_url =
       command_line->HasSwitch(::switches::kGaiaUrl)
           ? GURL(command_line->GetSwitchValueASCII(::switches::kGaiaUrl))
           : GaiaUrls::GetInstance()->gaia_url();
   params.SetString("gaiaUrl", gaia_url.spec());
 
   if (context.embedded_signin_enabled) {
     params.SetBoolean("useEmbedded", true);
     // We set 'constrained' here to switch troubleshooting page on embedded
@@ skipping 487 matching lines @@
                              password_changed_for_.count(populated_email_);
   context.use_offline = offline;
   context.email = populated_email_;
   context.is_enrolling_consumer_management = is_enrolling_consumer_management_;
   if (Delegate()) {
     context.show_users = Delegate()->IsShowUsers();
     context.has_users = !Delegate()->GetUsers().empty();
   }
 
   context.embedded_signin_enabled =
-      CommandLine::ForCurrentProcess()->HasSwitch(
+      base::CommandLine::ForCurrentProcess()->HasSwitch(
           chromeos::switches::kEnableEmbeddedSignin) ||
       embedded_signin_enabled_by_shortcut_;
 
   populated_email_.clear();
 
   LoadGaia(context);
 }
 
 void GaiaScreenHandler::UpdateState(ErrorScreenActor::ErrorReason reason) {
   if (signin_screen_handler_)
     signin_screen_handler_->UpdateState(reason);
 }
 
 SigninScreenHandlerDelegate* GaiaScreenHandler::Delegate() {
   DCHECK(signin_screen_handler_);
   return signin_screen_handler_->delegate_;
 }
 
 void GaiaScreenHandler::SetSigninScreenHandler(SigninScreenHandler* handler) {
   signin_screen_handler_ = handler;
 }
 }  // namespace chromeos