Make login code not depend on Ash when use_athena=1

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 "ash/multi_profile_uma.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/format_macros.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/scoped_user_pref_update.h"
@@ skipping 32 matching lines @@
 #include "components/user_manager/remove_user_delegate.h"
 #include "components/user_manager/user_image/user_image.h"
 #include "components/user_manager/user_type.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_service.h"
 #include "policy/policy_constants.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/wm/core/wm_core_switches.h"
 
 #if !defined(USE_ATHENA)
+#include "ash/multi_profile_uma.h"
 #include "chrome/browser/chromeos/login/users/wallpaper/wallpaper_manager.h"
 #endif
 
 using content::BrowserThread;
 
 namespace chromeos {
 namespace {
 
 // A vector pref of the the regular users known on this device, arranged in LRU
 // order.
@@ skipping 982 matching lines @@
   ChromeUserManager::NotifyUserAddedToSession(added_user, user_switch_pending);
 }
 
 void ChromeUserManagerImpl::OnUserNotAllowed(const std::string& user_email) {
   LOG(ERROR) << "Shutdown session because a user is not allowed to be in the "
                 "current session";
   chromeos::ShowMultiprofilesSessionAbortedDialog(user_email);
 }
 
 void ChromeUserManagerImpl::UpdateNumberOfUsers() {
+#if !defined(USE_ATHENA)
   size_t users = GetLoggedInUsers().size();
   if (users) {
     // Write the user number as UMA stat when a multi user session is possible.
     if ((users + GetUsersAllowedForMultiProfile().size()) > 1)
       ash::MultiProfileUMA::RecordUserCount(users);
   }
+#endif
 
   base::debug::SetCrashKeyValue(
       crash_keys::kNumberOfUsers,
       base::StringPrintf("%" PRIuS, GetLoggedInUsers().size()));
 }
 
 }  // namespace chromeos