Add baked-in favicons for default popular sites on NTP

components/ntp_tiles/most_visited_sites_unittest.cc

 // 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.
 
 #include "components/ntp_tiles/most_visited_sites.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <ostream>
@@ skipping 216 matching lines @@
               },
              ])",
           net::HTTP_OK, net::URLRequestStatus::SUCCESS);
     }
   }
 
   std::unique_ptr<PopularSites> New() {
     return base::MakeUnique<PopularSitesImpl>(
         worker_pool_owner_.pool().get(), prefs_,
         /*template_url_service=*/nullptr,
-        /*variations_service=*/nullptr, url_request_context_.get(),
+        /*variations_service=*/nullptr,
+        /*favicon_service=*/nullptr, url_request_context_.get(),
         /*directory=*/base::FilePath(), base::Bind(JsonUnsafeParser::Parse));
   }
 
  private:
   PrefService* prefs_;
   net::FakeURLFetcherFactory url_fetcher_factory_;
   scoped_refptr<net::TestURLRequestContextGetter> url_request_context_;
   base::SequencedWorkerPoolOwner worker_pool_owner_;
 };
 
@@ skipping 557 matching lines @@
                   MatchesTile("Site 4", "https://www.site4.com/",
                               NTPTileSource::TOP_SITES),
                   MatchesTile("Site 1", "https://www.site1.com/",
                               NTPTileSource::POPULAR),
                   MatchesTile("Site 2", "https://www.site2.com/",
                               NTPTileSource::POPULAR)));
 }
 
 }  // namespace
 }  // namespace ntp_tiles