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 216 matching lines @@
       "https://www.gstatic.com/chrome/ntp/suggested_sites_ZZ_9.json");
   RespondWith404(
       "https://www.gstatic.com/chrome/ntp/suggested_sites_DEFAULT_5.json");
 
   PopularSites::SitesVector sites;
   EXPECT_THAT(FetchPopularSites(/*force_download=*/false, &sites),
               Eq(base::Optional<bool>(false)));
   EXPECT_THAT(sites.size(), Eq(GetNumberOfDefaultPopularSitesForPlatform()));
 }
 
+TEST_F(PopularSitesTest, AddsIconResourcesToDefaultPages) {
+  scoped_refptr<net::TestURLRequestContextGetter> url_request_context(
+      new net::TestURLRequestContextGetter(
+          base::ThreadTaskRunnerHandle::Get()));
+  std::unique_ptr<PopularSites> popular_sites =
+      CreatePopularSites(url_request_context.get());
+
+  for (const auto& site : popular_sites->sites()) {
+    EXPECT_TRUE(site.default_resource_id > 0);
+  }
+}
+
 TEST_F(PopularSitesTest, ProvidesDefaultSitesUntilCallbackReturns) {
   SetCountryAndVersion("ZZ", "9");
   RespondWithJSON(
       "https://www.gstatic.com/chrome/ntp/suggested_sites_ZZ_9.json",
       {kWikipedia});
   scoped_refptr<net::TestURLRequestContextGetter> url_request_context(
       new net::TestURLRequestContextGetter(
           base::ThreadTaskRunnerHandle::Get()));
   std::unique_ptr<PopularSites> popular_sites =
       CreatePopularSites(url_request_context.get());
@@ skipping 168 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