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

chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager.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/wallpaper/wallpaper_manager.h"
 
 #include <numeric>
 #include <vector>
 
 #include "ash/ash_constants.h"
@@ skipping 356 matching lines @@
   // Apply device customization.
   if (ShouldUseCustomizedDefaultWallpaper()) {
     SetDefaultWallpaperPath(GetCustomizedWallpaperDefaultRescaledFileName(
                                 wallpaper::kSmallWallpaperSuffix),
                             scoped_ptr<gfx::ImageSkia>().Pass(),
                             GetCustomizedWallpaperDefaultRescaledFileName(
                                 wallpaper::kLargeWallpaperSuffix),
                             scoped_ptr<gfx::ImageSkia>().Pass());
   }
 
-  CommandLine* command_line = GetCommandLine();
+  base::CommandLine* command_line = GetCommandLine();
   if (command_line->HasSwitch(chromeos::switches::kGuestSession)) {
     // Guest wallpaper should be initialized when guest login.
     // Note: This maybe called before login. So IsLoggedInAsGuest can not be
     // used here to determine if current user is guest.
     return;
   }
 
   if (command_line->HasSwitch(::switches::kTestType))
     WizardController::SetZeroDelays();
 
@@ skipping 624 matching lines @@
     }
   }
 
   if (need_update_screen) {
     DoSetDefaultWallpaper(std::string(),
                           MovableOnDestroyCallbackHolder().Pass());
   }
 }
 
 }  // namespace chromeos