[NTP::Downloads] Do not show old downloads.

chrome/browser/ntp_snippets/content_suggestions_service_factory.cc

Index: chrome/browser/ntp_snippets/content_suggestions_service_factory.cc
diff --git a/chrome/browser/ntp_snippets/content_suggestions_service_factory.cc b/chrome/browser/ntp_snippets/content_suggestions_service_factory.cc
index b3befc0d38ee143688df8522e50c1136b7af90f5..033f9c92c00a60122024a3dda5b732676bd5f9cd 100644
--- a/chrome/browser/ntp_snippets/content_suggestions_service_factory.cc
+++ b/chrome/browser/ntp_snippets/content_suggestions_service_factory.cc
@@ -121,7 +121,7 @@ void RegisterDownloadsProvider(OfflinePageModel* offline_page_model,
                                PrefService* pref_service) {
   auto provider = base::MakeUnique<DownloadSuggestionsProvider>(
       service, offline_page_model, download_manager, download_history,
-      pref_service);
+      pref_service, base::MakeUnique<base::DefaultClock>());
   service->RegisterProvider(std::move(provider));
 }
 #endif  // OS_ANDROID