Add baked-in favicons for default popular sites on NTP

components/ntp_tiles/popular_sites_impl.h

Index: components/ntp_tiles/popular_sites_impl.h
diff --git a/components/ntp_tiles/popular_sites_impl.h b/components/ntp_tiles/popular_sites_impl.h
index 17280da01a417e33756a6ded4d3dc0174f1f3a71..63e5f4d215a92125b93a76d2ea109ef32c8dd5c7 100644
--- a/components/ntp_tiles/popular_sites_impl.h
+++ b/components/ntp_tiles/popular_sites_impl.h
@@ -26,6 +26,10 @@ namespace net {
 class URLRequestContextGetter;
 }
 
+namespace favicon {
+class FaviconService;
+}
+
 namespace user_prefs {
 class PrefRegistrySyncable;
 }
@@ -53,6 +57,7 @@ class PopularSitesImpl : public PopularSites, public net::URLFetcherDelegate {
       PrefService* prefs,
       const TemplateURLService* template_url_service,
       variations::VariationsService* variations_service,
+      favicon::FaviconService* favicon_service,
       net::URLRequestContextGetter* download_context,
       const base::FilePath& directory,
       ParseJSONCallback parse_json);