Implemented inline login dialog for Chrome OS.

ash/system/user/user_accounts_delegate.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 ASH_SYSTEM_USER_USER_ACCOUNTS_DELEGATE_H_
 #define ASH_SYSTEM_USER_USER_ACCOUNTS_DELEGATE_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 17 matching lines @@
    private:
     DISALLOW_COPY_AND_ASSIGN(Observer);
   };
 
   UserAccountsDelegate();
   virtual ~UserAccountsDelegate();
 
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
-  // Returns the user's primary account as a canonicalized email address.
-  virtual std::string GetPrimaryAccount() = 0;
+  // Returns the user's primary account's ID.
+  virtual std::string GetPrimaryAccountId() = 0;
 
-  // Returns a list of the user's secondary accounts in form of canonicalized
-  // email addresses.
-  virtual std::vector<std::string> GetSecondaryAccountsList() = 0;
+  // Returns a list of the user's secondary accounts' IDs.
+  virtual std::vector<std::string> GetSecondaryAccountIds() = 0;
 
-  // Returns display name for given |account_id|. It has form of email but could
-  // be uncanonical, e.g. account "test-user@gmail.com" could have display
-  // name "Test-user+AfterPlus@gmail.com".
+  // Returns display name for given |account_id|.
   virtual std::string GetAccountDisplayName(const std::string& account_id) = 0;
 
   // Deletes given |account_id| from the list of user's account. Passing
   // |account_id| that is not from list is no-op.
   virtual void DeleteAccount(const std::string& account_id) = 0;
 
   // Launches a dialog which lets the user add a new account.
   virtual void LaunchAddAccountDialog() = 0;
 
  protected:
   void NotifyAccountListChanged();
 
  private:
   ObserverList<Observer> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(UserAccountsDelegate);
 };
 
 }  // namespace tray
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_USER_USER_ACCOUNTS_DELEGATE_H_