Add more features to ntp-tiles-internal

ios/chrome/browser/ui/webui/ntp_tiles_internals_ui.cc

 // 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.
 
 #include "ios/chrome/browser/ui/webui/ntp_tiles_internals_ui.h"
 
 #include "components/grit/components_resources.h"
 #include "components/ntp_tiles/field_trial.h"
 #include "components/ntp_tiles/most_visited_sites.h"
-#include "components/ntp_tiles/popular_sites.h"
 #include "components/ntp_tiles/webui/ntp_tiles_internals_message_handler.h"
 #include "components/ntp_tiles/webui/ntp_tiles_internals_message_handler_client.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/chrome_url_constants.h"
 #include "ios/chrome/browser/ntp_tiles/ios_most_visited_sites_factory.h"
 #include "ios/chrome/browser/ntp_tiles/ios_popular_sites_factory.h"
 #include "ios/web/public/web_thread.h"
 #include "ios/web/public/web_ui_ios_data_source.h"
 #include "ios/web/public/webui/web_ui_ios.h"
 #include "ios/web/public/webui/web_ui_ios_message_handler.h"
 
 namespace {
 
 // The implementation for the chrome://ntp-tiles-internals page.
 class IOSNTPTilesInternalsMessageHandlerBridge
     : public web::WebUIIOSMessageHandler,
       public ntp_tiles::NTPTilesInternalsMessageHandlerClient {
  public:
   IOSNTPTilesInternalsMessageHandlerBridge() {}
 
  private:
   // web::WebUIIOSMessageHandler:
   void RegisterMessages() override;
 
   // ntp_tiles::NTPTilesInternalsMessageHandlerClient
-  bool DoesSourceExist(ntp_tiles::NTPTileSource source) override;
+  base::SequencedWorkerPool* GetBlockingPool() override;
   std::unique_ptr<ntp_tiles::MostVisitedSites> MakeMostVisitedSites() override;
-  std::unique_ptr<ntp_tiles::PopularSites> MakePopularSites() override;
   PrefService* GetPrefs() override;
   void RegisterMessageCallback(
       const std::string& message,
       const base::Callback<void(const base::ListValue*)>& callback) override;
   void CallJavascriptFunctionVector(
       const std::string& name,
       const std::vector<const base::Value*>& values) override;
 
   ntp_tiles::NTPTilesInternalsMessageHandler handler_;
 
   DISALLOW_COPY_AND_ASSIGN(IOSNTPTilesInternalsMessageHandlerBridge);
 };
 
 void IOSNTPTilesInternalsMessageHandlerBridge::RegisterMessages() {
   handler_.RegisterMessages(this);
 }
 
-bool IOSNTPTilesInternalsMessageHandlerBridge::DoesSourceExist(
-    ntp_tiles::NTPTileSource source) {
-  switch (source) {
-    case ntp_tiles::NTPTileSource::TOP_SITES:
-    case ntp_tiles::NTPTileSource::SUGGESTIONS_SERVICE:
-    case ntp_tiles::NTPTileSource::POPULAR:
-      return true;
-    case ntp_tiles::NTPTileSource::WHITELIST:
-      return false;
-  }
-  NOTREACHED();
-  return false;
+base::SequencedWorkerPool*
+IOSNTPTilesInternalsMessageHandlerClient::GetBlockingPool() {
+  return web::WebThread::GetBlockingPool();
 }
 
 std::unique_ptr<ntp_tiles::MostVisitedSites>
 IOSNTPTilesInternalsMessageHandlerBridge::MakeMostVisitedSites() {
   return IOSMostVisitedSitesFactory::NewForBrowserState(
       ios::ChromeBrowserState::FromWebUIIOS(web_ui()));
 }
 
-std::unique_ptr<ntp_tiles::PopularSites>
-IOSNTPTilesInternalsMessageHandlerBridge::MakePopularSites() {
-  return IOSPopularSitesFactory::NewForBrowserState(
-      ios::ChromeBrowserState::FromWebUIIOS(web_ui()));
-}
-
 PrefService* IOSNTPTilesInternalsMessageHandlerBridge::GetPrefs() {
   return ios::ChromeBrowserState::FromWebUIIOS(web_ui())->GetPrefs();
 }
 
 void IOSNTPTilesInternalsMessageHandlerBridge::RegisterMessageCallback(
     const std::string& message,
     const base::Callback<void(const base::ListValue*)>& callback) {
   web_ui()->RegisterMessageCallback(message, callback);
 }
 
 void IOSNTPTilesInternalsMessageHandlerBridge::CallJavascriptFunctionVector(
     const std::string& name,
     const std::vector<const base::Value*>& values) {
   web_ui()->CallJavascriptFunction(name, values);
 }
 
-}  // namespace
-
 web::WebUIIOSDataSource* CreateNTPTilesInternalsHTMLSource() {
   web::WebUIIOSDataSource* source =
       web::WebUIIOSDataSource::Create(kChromeUINTPTilesInternalsHost);
 
   source->AddResourcePath("ntp_tiles_internals.js", IDR_NTP_TILES_INTERNALS_JS);
   source->AddResourcePath("ntp_tiles_internals.css",
                           IDR_NTP_TILES_INTERNALS_CSS);
   source->SetDefaultResource(IDR_NTP_TILES_INTERNALS_HTML);
   return source;
 }
 
+}  // namespace
+
 NTPTilesInternalsUI::NTPTilesInternalsUI(web::WebUIIOS* web_ui)
     : web::WebUIIOSController(web_ui) {
   web::WebUIIOSDataSource::Add(ios::ChromeBrowserState::FromWebUIIOS(web_ui),
                                CreateNTPTilesInternalsHTMLSource());
   web_ui->AddMessageHandler(new IOSNTPTilesInternalsMessageHandlerBridge);
 }
 
 NTPTilesInternalsUI::~NTPTilesInternalsUI() {}