Add a new method to the ProfileInfoCacheObserver for signin status changes.

chrome/browser/ui/webui/signin/user_manager_screen_handler.cc

 // Copyright 2013 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.
 
 #include "chrome/browser/ui/webui/signin/user_manager_screen_handler.h"
 
 #include "base/bind.h"
 #include "base/value_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 122 matching lines @@
   }
 
   virtual void OnProfileWasRemoved(
       const base::FilePath& profile_path,
       const base::string16& profile_name) OVERRIDE {
     // TODO(noms): Change 'SendUserList' to 'removeUser' JS-call when
     // UserManager is able to find pod belonging to removed user.
     user_manager_handler_->SendUserList();
   }
 
-  virtual void OnProfileWillBeRemoved(
-      const base::FilePath& profile_path) OVERRIDE {
-    // No-op. When the profile is actually removed, OnProfileWasRemoved
-    // will be called.
-  }
-
   virtual void OnProfileNameChanged(
       const base::FilePath& profile_path,
       const base::string16& old_profile_name) OVERRIDE {
     user_manager_handler_->SendUserList();
   }
 
   virtual void OnProfileAvatarChanged(
       const base::FilePath& profile_path) OVERRIDE {
     user_manager_handler_->SendUserList();
   }
 
+  virtual void OnProfileSigninRequiredChanged(
+      const base::FilePath& profile_path) OVERRIDE {
+    user_manager_handler_->SendUserList();
+  }
+
   ProfileManager* profile_manager_;
 
   UserManagerScreenHandler* user_manager_handler_;  // Weak; owns us.
 
   DISALLOW_COPY_AND_ASSIGN(ProfileUpdateObserver);
 };
 
 // UserManagerScreenHandler ---------------------------------------------------
 
 UserManagerScreenHandler::UserManagerScreenHandler()
@@ skipping 241 matching lines @@
     // The row of user pods should display the active user first.
     if (is_active_user)
       users_list.Insert(0, profile_value);
     else
       users_list.Append(profile_value);
   }
 
   web_ui()->CallJavascriptFunction("login.AccountPickerScreen.loadUsers",
     users_list, base::FundamentalValue(false), base::FundamentalValue(true));
 }