This CL replaces e-mail with AccountId in easy signin code.

chrome/browser/chromeos/login/screens/user_selection_screen.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_USER_SELECTION_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_USER_SELECTION_SCREEN_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 46 matching lines @@
   void CheckUserStatus(const AccountId& account_id);
 
   // ui::UserActivityDetector implementation:
   void OnUserActivity(const ui::Event* event) override;
 
   void InitEasyUnlock();
 
   // proximity_auth::ScreenlockBridge::LockHandler implementation:
   void ShowBannerMessage(const base::string16& message) override;
   void ShowUserPodCustomIcon(
-      const std::string& user_email,
+      const AccountId& account_id,
       const proximity_auth::ScreenlockBridge::UserPodCustomIconOptions& icon)
       override;
-  void HideUserPodCustomIcon(const std::string& user_email) override;
+  void HideUserPodCustomIcon(const AccountId& account_id) override;
 
   void EnableInput() override;
-  void SetAuthType(const std::string& user_email,
+  void SetAuthType(const AccountId& account_id,
                    AuthType auth_type,
                    const base::string16& auth_value) override;
-  AuthType GetAuthType(const std::string& user_email) const override;
+  AuthType GetAuthType(const AccountId& account_id) const override;
   ScreenType GetScreenType() const override;
 
-  void Unlock(const std::string& user_email) override;
-  void AttemptEasySignin(const std::string& user_email,
+  void Unlock(const AccountId& account_id) override;
+  void AttemptEasySignin(const AccountId& account_id,
                          const std::string& secret,
                          const std::string& key_label) override;
 
   // UserBoardModel implementation.
   void SendUserList() override;
   void HardLockPod(const AccountId& account_id) override;
   void AttemptEasyUnlock(const AccountId& account_id) override;
   void RecordClickOnLockIcon(const AccountId& account_id) override;
 
   // Fills |user_dict| with information about |user|.
@@ skipping 55 matching lines @@
   scoped_ptr<TokenHandleUtil> token_handle_util_;
 
   base::WeakPtrFactory<UserSelectionScreen> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(UserSelectionScreen);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_USER_SELECTION_SCREEN_H_