ntp_tiles: Extend chrome://ntp-tiles-internals with favicon data

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 "chrome/browser/ui/webui/ntp_tiles_internals_ui.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/favicon/favicon_service_factory.h"
 #include "chrome/browser/history/top_sites_factory.h"
@@ skipping 16 matching lines @@
 #include "content/public/browser/web_ui_data_source.h"
 #include "content/public/browser/web_ui_message_handler.h"
 
 namespace {
 
 // The implementation for the chrome://ntp-tiles-internals page.
 class ChromeNTPTilesInternalsMessageHandlerClient
     : public content::WebUIMessageHandler,
       public ntp_tiles::NTPTilesInternalsMessageHandlerClient {
  public:
-  ChromeNTPTilesInternalsMessageHandlerClient() {}
+  // |favicon_service| must not be null and must outlive this object.
+  explicit ChromeNTPTilesInternalsMessageHandlerClient(
+      favicon::FaviconService* favicon_service)
+      : handler_(favicon_service) {}
 
  private:
   // content::WebUIMessageHandler:
   void RegisterMessages() override;
 
   // ntp_tiles::NTPTilesInternalsMessageHandlerClient
   bool SupportsNTPTiles() override;
   bool DoesSourceExist(ntp_tiles::TileSource source) override;
   std::unique_ptr<ntp_tiles::MostVisitedSites> MakeMostVisitedSites() override;
   PrefService* GetPrefs() override;
@@ skipping 67 matching lines @@
   source->AddResourcePath("ntp_tiles_internals.css",
                           IDR_NTP_TILES_INTERNALS_CSS);
   source->SetDefaultResource(IDR_NTP_TILES_INTERNALS_HTML);
   return source;
 }
 
 }  // namespace
 
 NTPTilesInternalsUI::NTPTilesInternalsUI(content::WebUI* web_ui)
     : WebUIController(web_ui) {
-  content::WebUIDataSource::Add(Profile::FromWebUI(web_ui),
-                                CreateNTPTilesInternalsHTMLSource());
+  Profile* profile = Profile::FromWebUI(web_ui);
+  content::WebUIDataSource::Add(profile, CreateNTPTilesInternalsHTMLSource());
   web_ui->AddMessageHandler(
-      base::MakeUnique<ChromeNTPTilesInternalsMessageHandlerClient>());
+      base::MakeUnique<ChromeNTPTilesInternalsMessageHandlerClient>(
+          FaviconServiceFactory::GetForProfile(
+              profile, ServiceAccessType::EXPLICIT_ACCESS)));
 }
 
 NTPTilesInternalsUI::~NTPTilesInternalsUI() {}