Add chrome://popular-sites-internals/ to iOS.

chrome/browser/ui/webui/popular_sites_internals_message_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_POPULAR_SITES_INTERNALS_MESSAGE_HANDLER_H_
-#define CHROME_BROWSER_UI_WEBUI_POPULAR_SITES_INTERNALS_MESSAGE_HANDLER_H_
-
-#include <memory>
-#include <string>
-
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "content/public/browser/web_ui_message_handler.h"
-
-namespace base {
-class ListValue;
-}  // namespace base
-
-namespace ntp_tiles {
-class PopularSites;
-}  // namespace ntp_tiles
-
-// The implementation for the chrome://popular-sites-internals page.
-class PopularSitesInternalsMessageHandler
-    : public content::WebUIMessageHandler {
- public:
-  PopularSitesInternalsMessageHandler();
-  ~PopularSitesInternalsMessageHandler() override;
-
- private:
-  // content::WebUIMessageHandler:
-  void RegisterMessages() override;
-
-  void HandleRegisterForEvents(const base::ListValue* args);
-  void HandleUpdate(const base::ListValue* args);
-  void HandleViewJson(const base::ListValue* args);
-
-  void SendOverrides();
-  void SendDownloadResult(bool success);
-  void SendSites();
-  void SendJson(const std::string& json);
-
-  void OnPopularSitesAvailable(bool explicit_request, bool success);
-
-  std::unique_ptr<ntp_tiles::PopularSites> popular_sites_;
-
-  base::WeakPtrFactory<PopularSitesInternalsMessageHandler> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(PopularSitesInternalsMessageHandler);
-};
-
-#endif  // CHROME_BROWSER_UI_WEBUI_POPULAR_SITES_INTERNALS_MESSAGE_HANDLER_H_