Add baked-in favicons for default popular sites on NTP

components/ntp_tiles/popular_sites_impl_unittest.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 "components/ntp_tiles/popular_sites_impl.h"
 
 #include <map>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 135 matching lines @@
     }
     *sites = popular_sites->sites();
     return save_success;
   }
 
   std::unique_ptr<PopularSites> CreatePopularSites(
       net::URLRequestContextGetter* context) {
     return base::MakeUnique<PopularSitesImpl>(
         worker_pool_owner_.pool().get(), &prefs_,
         /*template_url_service=*/nullptr,
-        /*variations_service=*/nullptr, context, cache_dir_,
+        /*variations_service=*/nullptr,
+        /*favicon_service=*/nullptr, context, cache_dir_,
         base::Bind(JsonUnsafeParser::Parse));
   }
 
   const TestPopularSite kWikipedia;
   const TestPopularSite kYouTube;
   const TestPopularSite kChromium;
 
   base::MessageLoopForUI ui_loop_;
   base::SequencedWorkerPoolOwner worker_pool_owner_;
   base::ScopedTempDir scoped_cache_dir_;
@@ skipping 248 matching lines @@
       "https://www.gstatic.com/chrome/ntp/suggested_sites_ZZ_9.json",
       {kChromium});
   EXPECT_THAT(FetchPopularSites(/*force_download=*/false, &sites),
               Eq(base::Optional<bool>(true)));
   ASSERT_THAT(sites.size(), Eq(1u));
   EXPECT_THAT(sites[0].url, URLEq("https://www.chromium.org/"));
 }
 
 }  // namespace
 }  // namespace ntp_tiles