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

chrome/browser/chromeos/login/users/chrome_user_manager_impl.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 "chrome/browser/chromeos/login/users/chrome_user_manager_impl.h"
 
 #include <cstddef>
 #include <set>
 
 #include "base/bind.h"
@@ skipping 746 matching lines @@
     }
   }
   std::string kiosk_app_id;
   if (account) {
     kiosk_app_id = account->kiosk_app_id;
   } else {
     LOG(ERROR) << "Logged into nonexistent kiosk-app account: " << app_id;
     NOTREACHED();
   }
 
-  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   command_line->AppendSwitch(::switches::kForceAppMode);
   command_line->AppendSwitchASCII(::switches::kAppId, kiosk_app_id);
 
   // Disable window animation since kiosk app runs in a single full screen
   // window and window animation causes start-up janks.
   command_line->AppendSwitch(wm::switches::kWindowAnimationsDisabled);
 }
 
 void ChromeUserManagerImpl::DemoAccountLoggedIn() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   active_user_ =
       user_manager::User::CreateKioskAppUser(DemoAppLauncher::kDemoUserName);
   active_user_->SetStubImage(
       user_manager::UserImage(
           *ResourceBundle::GetSharedInstance().GetImageSkiaNamed(
               IDR_PROFILE_PICTURE_LOADING)),
       user_manager::User::USER_IMAGE_INVALID,
       false);
 #if !defined(USE_ATHENA)
   WallpaperManager::Get()->SetUserWallpaperNow(DemoAppLauncher::kDemoUserName);
 #endif
 
-  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   command_line->AppendSwitch(::switches::kForceAppMode);
   command_line->AppendSwitchASCII(::switches::kAppId,
                                   DemoAppLauncher::kDemoAppId);
 
   // Disable window animation since the demo app runs in a single full screen
   // window and window animation causes start-up janks.
-  CommandLine::ForCurrentProcess()->AppendSwitch(
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
       wm::switches::kWindowAnimationsDisabled);
 }
 
 void ChromeUserManagerImpl::NotifyOnLogin() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   UserSessionManager::OverrideHomedir();
   UpdateNumberOfUsers();
 
   ChromeUserManager::NotifyOnLogin();
@@ skipping 263 matching lines @@
       ash::MultiProfileUMA::RecordUserCount(users);
   }
 #endif
 
   base::debug::SetCrashKeyValue(
       crash_keys::kNumberOfUsers,
       base::StringPrintf("%" PRIuS, GetLoggedInUsers().size()));
 }
 
 }  // namespace chromeos