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

chrome/browser/chromeos/login/ui/captive_portal_window_browsertest.cc

 // Copyright 2014 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 "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/chromeos/login/login_manager_test.h"
 #include "chrome/browser/chromeos/login/startup_utils.h"
@@ skipping 56 matching lines @@
     captive_portal_window_proxy_->OnOriginalURLLoaded();
   }
 
   void CheckState(bool is_shown, int num_portal_notifications) {
     bool actual_is_shown = (CaptivePortalWindowProxy::STATE_DISPLAYED ==
                             captive_portal_window_proxy_->GetState());
     ASSERT_EQ(is_shown, actual_is_shown);
     ASSERT_EQ(num_portal_notifications, delegate_.num_portal_notifications());
   }
 
-  virtual void SetUpCommandLine(CommandLine* command_line) override {
+  virtual void SetUpCommandLine(base::CommandLine* command_line) override {
     command_line->AppendSwitch(chromeos::switches::kForceLoginManagerInTests);
     command_line->AppendSwitch(chromeos::switches::kLoginManager);
   }
 
   virtual void SetUpOnMainThread() override {
     host_ = LoginDisplayHostImpl::default_host();
     CHECK(host_);
     content::WebContents* web_contents =
         LoginDisplayHostImpl::default_host()->GetWebUILoginView()->
             GetWebContents();
@@ skipping 139 matching lines @@
 
   ASSERT_EQ(PortalDetectorStrategy::STRATEGY_ID_LOGIN_SCREEN, strategy_id());
   network_portal_detector()->NotifyObserversForTesting();
   OobeScreenWaiter(OobeDisplay::SCREEN_ERROR_MESSAGE).Wait();
   ASSERT_EQ(PortalDetectorStrategy::STRATEGY_ID_ERROR_SCREEN, strategy_id());
 
   actor->ShowCaptivePortal();
 }
 
 }  // namespace chromeos