[cros] Display emails of users are stored in a separate dictionary in Local State.

chrome/browser/chromeos/login/existing_user_controller.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_EXISTING_USER_CONTROLLER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_EXISTING_USER_CONTROLLER_H_
 #pragma once
 
 #include <string>
 
@@ skipping 48 matching lines @@
     return current_controller_;
   }
 
   // Creates and shows login UI for known users.
   void Init(const UserList& users);
 
   // LoginDisplay::Delegate: implementation
   virtual void CreateAccount() OVERRIDE;
   virtual string16 GetConnectedNetworkName() OVERRIDE;
   virtual void FixCaptivePortal() OVERRIDE;
+  virtual void SetDisplayEmail(const std::string& email) OVERRIDE;
   virtual void CompleteLogin(const std::string& username,
                              const std::string& password) OVERRIDE;
   virtual void Login(const std::string& username,
                      const std::string& password) OVERRIDE;
   virtual void LoginAsGuest() OVERRIDE;
   virtual void OnUserSelected(const std::string& username) OVERRIDE;
   virtual void OnStartEnterpriseEnrollment() OVERRIDE;
 
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
@@ skipping 116 matching lines @@
 
   // Whether two factor credentials were used.
   bool two_factor_credentials_;
 
   // Used to verify ownership before starting enterprise enrollment.
   scoped_ptr<OwnershipStatusChecker> ownership_checker_;
 
   // Whether it's first login to the device and this user will be owner.
   bool is_owner_login_;
 
+  // The displayed email for the next login attempt set by |SetDisplayEmail|.
+  std::string display_email_;
+
   FRIEND_TEST_ALL_PREFIXES(ExistingUserControllerTest, NewUserLogin);
 
   DISALLOW_COPY_AND_ASSIGN(ExistingUserController);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_EXISTING_USER_CONTROLLER_H_