Implement new design for expanded public session pod design

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/lazy_instance.h"
@@ skipping 23 matching lines @@
 
   class LockHandler {
    public:
     // Supported authentication types. Keep in sync with the enum in
     // user_pod_row.js.
     enum AuthType {
       OFFLINE_PASSWORD = 0,
       ONLINE_SIGN_IN = 1,
       NUMERIC_PIN = 2,
       USER_CLICK = 3,
+      EXPAND_THEN_USER_CLICK = 4,
     };
 
     // Displays |message| in a banner on the lock screen.
     virtual void ShowBannerMessage(const std::string& message) = 0;
 
     // Shows a custom icon in the user pod on the lock screen.
     virtual void ShowUserPodCustomIcon(const std::string& user_email,
                                        const gfx::Image& icon) = 0;
 
     // Hides the custom icon in user pod for a user.
@@ skipping 38 matching lines @@
   ScreenlockBridge();
   ~ScreenlockBridge();
 
   LockHandler* lock_handler_;  // Not owned
   ObserverList<Observer, true> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(ScreenlockBridge);
 };
 
 #endif  // CHROME_BROWSER_SIGNIN_SCREENLOCK_BRIDGE_H_