[Easy signin] Add method to get user info to easyUnlockPrivate

chrome/browser/signin/screenlock_bridge.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_SIGNIN_SCREENLOCK_BRIDGE_H_
 #define CHROME_BROWSER_SIGNIN_SCREENLOCK_BRIDGE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 11 matching lines @@
 // support. On ChromeOS, it delegates calls to the ScreenLocker. On other
 // platforms, it delegates calls to UserManagerUI (and friends).
 class ScreenlockBridge {
  public:
   class Observer {
    public:
     // Invoked after the screen is locked.
     virtual void OnScreenDidLock() = 0;
     // Invoked after the screen lock is dismissed.
     virtual void OnScreenDidUnlock() = 0;
+    // Invoked when the user focused on the lock screen changes.
+    virtual void OnFocusedUserChanged(const std::string& user_id) = 0;
    protected:
     virtual ~Observer() {}
   };
 
   // Class containing parameters describing the custom icon that should be
   // shown on a user's screen lock pod next to the input field.
   class UserPodCustomIconOptions {
    public:
     UserPodCustomIconOptions();
     ~UserPodCustomIconOptions();
@@ skipping 90 matching lines @@
     virtual void Unlock(const std::string& user_email) = 0;
 
    protected:
     virtual ~LockHandler() {}
   };
 
   static ScreenlockBridge* Get();
   static std::string GetAuthenticatedUserEmail(Profile* profile);
 
   void SetLockHandler(LockHandler* lock_handler);
+  void SetFocusedUser(const std::string& user_id);
 
   bool IsLocked() const;
   void Lock(Profile* profile);
   void Unlock(Profile* profile);
 
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
   LockHandler* lock_handler() { return lock_handler_; }
 
+  std::string focused_user_id() const { return focused_user_id_; }
+
  private:
   friend struct base::DefaultLazyInstanceTraits<ScreenlockBridge>;
   friend struct base::DefaultDeleter<ScreenlockBridge>;
 
   ScreenlockBridge();
   ~ScreenlockBridge();
 
   LockHandler* lock_handler_;  // Not owned
+  // The last focused user's id.
+  std::string focused_user_id_;
   ObserverList<Observer, true> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenlockBridge);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_SCREENLOCK_BRIDGE_H_