Split NTPLoginHandler across chrome://apps and chrome://history.

chrome/browser/ui/webui/ntp/ntp_login_handler.h

-// Copyright (c) 2011 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_NTP_NTP_LOGIN_HANDLER_H_
-#define CHROME_BROWSER_UI_WEBUI_NTP_NTP_LOGIN_HANDLER_H_
-
-#include "base/prefs/pref_member.h"
-#include "chrome/browser/profiles/profile_info_cache_observer.h"
-#include "content/public/browser/web_ui_message_handler.h"
-
-class Profile;
-
-// The NTP login handler currently simply displays the current logged in
-// username at the top of the NTP (and update itself when that changes).
-// In the future it may expand to allow users to login from the NTP.
-class NTPLoginHandler : public content::WebUIMessageHandler,
-                        public ProfileInfoCacheObserver {
- public:
-  NTPLoginHandler();
-  ~NTPLoginHandler() override;
-
-  // WebUIMessageHandler implementation:
-  void RegisterMessages() override;
-
-  // ProfileInfoCacheObserver implementation:
-  void OnProfileAuthInfoChanged(const base::FilePath& profile_path) override;
-
-  // Returns true if the login handler should be shown in a new tab page
-  // for the given |profile|. |profile| must not be NULL.
-  static bool ShouldShow(Profile* profile);
-
-  // Registers values (strings etc.) for the page.
-  static void GetLocalizedValues(Profile* profile,
-                                 base::DictionaryValue* values);
-
- private:
-  // User actions while on the NTP when clicking on or viewing the sync promo.
-  enum NTPSignInPromoBuckets {
-    NTP_SIGN_IN_PROMO_VIEWED,
-    NTP_SIGN_IN_PROMO_CLICKED,
-    NTP_SIGN_IN_PROMO_BUCKET_BOUNDARY,
-  };
-
-  // Called from JS when the NTP is loaded. |args| is the list of arguments
-  // passed from JS and should be an empty list.
-  void HandleInitializeSyncLogin(const base::ListValue* args);
-
-  // Called from JS when the user clicks the login container. It shows the
-  // appropriate UI based on the current sync state. |args| is the list of
-  // arguments passed from JS and should be an empty list.
-  void HandleShowSyncLoginUI(const base::ListValue* args);
-
-  // Records actions in SyncPromo.NTPPromo histogram.
-  void RecordInHistogram(int type);
-
-  // Called from JS when the sync promo NTP bubble has been displayed. |args| is
-  // the list of arguments passed from JS and should be an empty list.
-  void HandleLoginMessageSeen(const base::ListValue* args);
-
-  // Called from JS when the user clicks on the advanced link the sync promo NTP
-  // bubble. Use use this to navigate to the sync settings page. |args| is the
-  // list of arguments passed from JS and should be an empty list.
-  void HandleShowAdvancedLoginUI(const base::ListValue* args);
-
-  // Internal helper method
-  void UpdateLogin();
-
-  BooleanPrefMember signin_allowed_pref_;
-};
-
-#endif  // CHROME_BROWSER_UI_WEBUI_NTP_NTP_LOGIN_HANDLER_H_