Replace FOR_EACH_OBSERVER in c/b/chromeos with range-based for

chrome/browser/chromeos/login/session/user_session_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/session/user_session_manager.h"
 
 #include <stddef.h>
 
 #include <set>
 #include <string>
@@ skipping 1511 matching lines @@
                  this);
   } else {
     RestorePendingUserSessions();
   }
 }
 
 void UserSessionManager::NotifyPendingUserSessionsRestoreFinished() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   user_sessions_restored_ = true;
   user_sessions_restore_in_progress_ = false;
-  FOR_EACH_OBSERVER(chromeos::UserSessionStateObserver,
-                    session_state_observer_list_,
-                    PendingUserSessionsRestoreFinished());
+  for (auto& observer : session_state_observer_list_)
+    observer.PendingUserSessionsRestoreFinished();
 }
 
 void UserSessionManager::UpdateEasyUnlockKeys(const UserContext& user_context) {
   // Skip key update because FakeCryptohomeClient always return success
   // and RefreshKeys op expects a failure to stop. As a result, some tests would
   // timeout.
   // TODO(xiyuan): Revisit this when adding tests.
   if (!base::SysInfo::IsRunningOnChromeOS())
     return;
 
@@ skipping 348 matching lines @@
           ->browser_policy_connector_chromeos()
           ->IsEnterpriseManaged()) {
     return false;
   }
 
   // Do not show end of life notification if this is a guest session
   return !profile->IsGuestSession();
 }
 
 }  // namespace chromeos