Add more features to ntp-tiles-internal

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

Index: ios/chrome/browser/ui/webui/ntp_tiles_internals_ui.cc
diff --git a/ios/chrome/browser/ui/webui/ntp_tiles_internals_ui.cc b/ios/chrome/browser/ui/webui/ntp_tiles_internals_ui.cc
index 554f34b8351cc4443000736dddd78368191b7b53..99c96ae0df721dbca44b6249cbbfdb7bddce5de1 100644
--- a/ios/chrome/browser/ui/webui/ntp_tiles_internals_ui.cc
+++ b/ios/chrome/browser/ui/webui/ntp_tiles_internals_ui.cc
@@ -7,7 +7,6 @@
 #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"
@@ -33,9 +32,8 @@ class IOSNTPTilesInternalsMessageHandlerBridge
   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,
@@ -53,18 +51,9 @@ 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>
@@ -73,12 +62,6 @@ IOSNTPTilesInternalsMessageHandlerBridge::MakeMostVisitedSites() {
       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();
 }
@@ -95,8 +78,6 @@ void IOSNTPTilesInternalsMessageHandlerBridge::CallJavascriptFunctionVector(
   web_ui()->CallJavascriptFunction(name, values);
 }
 
-}  // namespace
-
 web::WebUIIOSDataSource* CreateNTPTilesInternalsHTMLSource() {
   web::WebUIIOSDataSource* source =
       web::WebUIIOSDataSource::Create(kChromeUINTPTilesInternalsHost);
@@ -108,6 +89,8 @@ web::WebUIIOSDataSource* CreateNTPTilesInternalsHTMLSource() {
   return source;
 }
 
+}  // namespace
+
 NTPTilesInternalsUI::NTPTilesInternalsUI(web::WebUIIOS* web_ui)
     : web::WebUIIOSController(web_ui) {
   web::WebUIIOSDataSource::Add(ios::ChromeBrowserState::FromWebUIIOS(web_ui),