Settings People Revamp: Add 'Manage Supervised Users' row

chrome/browser/ui/webui/settings/profile_info_handler.h

 // Copyright 2016 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_UI_WEBUI_SETTINGS_PROFILE_INFO_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_SETTINGS_PROFILE_INFO_HANDLER_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/scoped_observer.h"
 #include "build/build_config.h"
 #include "chrome/browser/profiles/profile_attributes_storage.h"
 #include "chrome/browser/ui/webui/settings/settings_page_ui_handler.h"
+#include "components/prefs/pref_change_registrar.h"
 
 #if defined(OS_CHROMEOS)
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #endif
 
 class Profile;
 
 namespace settings {
 
 class ProfileInfoHandler : public SettingsPageUIHandler,
 #if defined(OS_CHROMEOS)
                            public content::NotificationObserver,
 #endif
                            public ProfileAttributesStorage::Observer {
  public:
   static const char kProfileInfoChangedEventName[];
+  static const char kProfileManagesSupervisedUsersChangedEventName[];
 
   explicit ProfileInfoHandler(Profile* profile);
   ~ProfileInfoHandler() override;
 
   // SettingsPageUIHandler implementation.
   void RegisterMessages() override;
   void OnJavascriptAllowed() override;
   void OnJavascriptDisallowed() override;
 
 #if defined(OS_CHROMEOS)
   // content::NotificationObserver implementation.
   void Observe(int type,
                const content::NotificationSource& source,
                const content::NotificationDetails& details) override;
 #endif
 
   // ProfileAttributesStorage::Observer implementation.
   void OnProfileNameChanged(const base::FilePath& profile_path,
                             const base::string16& old_profile_name) override;
   void OnProfileAvatarChanged(const base::FilePath& profile_path) override;
 
  private:
   FRIEND_TEST_ALL_PREFIXES(ProfileInfoHandlerTest, GetProfileInfo);
   FRIEND_TEST_ALL_PREFIXES(ProfileInfoHandlerTest, PushProfileInfo);
+  FRIEND_TEST_ALL_PREFIXES(ProfileInfoHandlerTest,
+                           GetProfileManagesSupervisedUsers);
+  FRIEND_TEST_ALL_PREFIXES(ProfileInfoHandlerTest,
+                           PushProfileManagesSupervisedUsers);
 
   // Callbacks from the page.
   void HandleGetProfileInfo(const base::ListValue* args);
+  void HandleGetProfileManagesSupervisedUsers(const base::ListValue* args);
 
   void PushProfileInfo();
 
+  // Pushes whether the current profile manages supervised users to JavaScript.
+  void PushProfileManagesSupervisedUsersStatus();
+
+  // Returns true if this profile manages supervised users.
+  bool IsProfileManagingSupervisedUsers() const;
+
   std::unique_ptr<base::DictionaryValue> GetAccountNameAndIcon() const;
 
   // Weak pointer.
   Profile* profile_;
 
   ScopedObserver<ProfileAttributesStorage, ProfileInfoHandler>
       profile_observer_;
 
+  // Used to listen for changes in the list of managed supervised users.
+  PrefChangeRegistrar profile_pref_registrar_;
+
 #if defined(OS_CHROMEOS)
   // Used to listen to ChromeOS user image changes.
   content::NotificationRegistrar registrar_;
 #endif
 
   DISALLOW_COPY_AND_ASSIGN(ProfileInfoHandler);
 };
 
 }  // namespace settings
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SETTINGS_PROFILE_INFO_HANDLER_H_