Add baked-in favicons for default popular sites on NTP

components/ntp_tiles/popular_sites_impl.cc

Index: components/ntp_tiles/popular_sites_impl.cc
diff --git a/components/ntp_tiles/popular_sites_impl.cc b/components/ntp_tiles/popular_sites_impl.cc
index 566202b07d88c8cc228312ce4c98dbf0a5776b03..842133a850fd3bb640b971228f1c2f4f4d7ed45d 100644
--- a/components/ntp_tiles/popular_sites_impl.cc
+++ b/components/ntp_tiles/popular_sites_impl.cc
@@ -21,6 +21,7 @@
 #include "components/google/core/browser/google_util.h"
 #include "components/ntp_tiles/constants.h"
 #include "components/ntp_tiles/field_trial.h"
+#include "components/ntp_tiles/icon_cacher.h"
 #include "components/ntp_tiles/pref_names.h"
 #include "components/ntp_tiles/switches.h"
 #include "components/pref_registry/pref_registry_syncable.h"
@@ -305,6 +306,23 @@ void PopularSitesImpl::RegisterProfilePrefs(
                                DefaultPopularSites().release());
 }
 
+// static
+void PopularSitesImpl::AddIconsForDefaultPagesToCacher(const PrefService& prefs,
+                                                       IconCacher* cacher) {
+#if defined(OS_ANDROID) || defined(OS_IOS)
+  PopularSites::SitesVector sites =
+      ParseSiteList(*prefs.GetList(kPopularSitesJsonPref));
+  cacher->AddDefaultImage(sites[0], IDR_DEFAULT_POPULAR_SITES_ICON0);
+  cacher->AddDefaultImage(sites[1], IDR_DEFAULT_POPULAR_SITES_ICON1);
+  cacher->AddDefaultImage(sites[2], IDR_DEFAULT_POPULAR_SITES_ICON2);
+  cacher->AddDefaultImage(sites[3], IDR_DEFAULT_POPULAR_SITES_ICON3);
+  cacher->AddDefaultImage(sites[4], IDR_DEFAULT_POPULAR_SITES_ICON4);
+  cacher->AddDefaultImage(sites[5], IDR_DEFAULT_POPULAR_SITES_ICON5);
+  cacher->AddDefaultImage(sites[6], IDR_DEFAULT_POPULAR_SITES_ICON6);
+  cacher->AddDefaultImage(sites[7], IDR_DEFAULT_POPULAR_SITES_ICON7);
+#endif
+}
+
 void PopularSitesImpl::FetchPopularSites() {
   fetcher_ = URLFetcher::Create(pending_url_, URLFetcher::GET, this);
   data_use_measurement::DataUseUserData::AttachToFetcher(