Replace chromeos::UserManager::Get() with chromeos::GetUserManager().

chrome/browser/chromeos/drive/drive_notification_manager_factory_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 "chrome/browser/drive/drive_notification_manager_factory.h"
 
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "chrome/browser/chromeos/login/users/user_manager.h"
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
@@ skipping 33 matching lines @@
     command_line->AppendSwitchASCII(chromeos::switches::kLoginProfile, "user");
     command_line->AppendSwitchASCII(chromeos::switches::kLoginUser,
                                     chromeos::UserManager::kGuestUserName);
   }
 };
 
 // Verify that no DriveNotificationManager is instantiated for the sign-in
 // profile or the guest profile while a guest session is in progress.
 IN_PROC_BROWSER_TEST_F(DriveNotificationManagerFactoryGuestBrowserTest,
                        NoDriveNotificationManager) {
-  chromeos::UserManager* user_manager = chromeos::UserManager::Get();
+  chromeos::UserManager* user_manager = chromeos::GetUserManager();
   EXPECT_TRUE(user_manager->IsLoggedInAsGuest());
   Profile* guest_profile = chromeos::ProfileHelper::Get()
                                ->GetProfileByUser(user_manager->GetActiveUser())
                                ->GetOriginalProfile();
   Profile* signin_profile =
       chromeos::ProfileHelper::GetSigninProfile()->GetOriginalProfile();
   EXPECT_FALSE(DriveNotificationManagerFactory::FindForBrowserContext(
       guest_profile));
   EXPECT_FALSE(DriveNotificationManagerFactory::FindForBrowserContext(
       signin_profile));
 }
 
 }  // namespace drive