Migrate the one-time notice into the MD settings CBD dialog

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

 // Copyright 2015 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_SETTINGS_CLEAR_BROWSING_DATA_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_SETTINGS_SETTINGS_CLEAR_BROWSING_DATA_HANDLER_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 48 matching lines @@
   void OnStateChanged() override;
 
   // Finds out whether we should show notice about other forms of history stored
   // in user's account.
   void RefreshHistoryNotice();
 
   // Called as an asynchronous response to |RefreshHistoryNotice()|. Shows or
   // hides the footer about other forms of history stored in user's account.
   void UpdateHistoryNotice(bool show);
 
+  // Called as an asynchronous response to |RefreshHistoryNotice()|. Enables or
+  // disables the dialog about other forms of history stored in user's account
+  // that is shown when the history deletion is finished.
+  void UpdateHistoryDeletionDialog(bool show);
+
   // Adds a browsing data |counter|.
   void AddCounter(std::unique_ptr<BrowsingDataCounter> counter);
 
   // Updates a counter text according to the |result|.
   void UpdateCounterText(std::unique_ptr<BrowsingDataCounter::Result> result);
 
   // Cached profile corresponding to the WebUI of this handler.
   Profile* profile_;
 
   // Counters that calculate the data volume for individual data types.
@@ skipping 10 matching lines @@
   // The WebUI callback ID of the last performClearBrowserData request. There
   // can only be one such request in-flight.
   std::string webui_callback_id_;
 
   // Used to listen for pref changes to allow / disallow deleting browsing data.
   PrefChangeRegistrar profile_pref_registrar_;
 
   // Whether the sentence about other forms of history stored in user's account
   // should be displayed in the footer. This value is retrieved asynchronously,
   // so we cache it here.
-  bool should_show_history_footer_;
+  bool show_history_footer_;
+
+  // Whether we should show a dialog informing the user about other forms of
+  // history stored in their account after the history deletion is finished.
+  bool show_history_deletion_dialog_;
 
   // A weak pointer factory for asynchronous calls referencing this class.
   base::WeakPtrFactory<ClearBrowsingDataHandler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ClearBrowsingDataHandler);
 };
 
 }  // namespace settings
 
 #endif  // CHROME_BROWSER_UI_WEBUI_SETTINGS_SETTINGS_CLEAR_BROWSING_DATA_HANDLER_H_