Sending LanguageModel info to suggestions server

ios/chrome/browser/ntp_snippets/ios_chrome_content_suggestions_service_factory.cc

Index: ios/chrome/browser/ntp_snippets/ios_chrome_content_suggestions_service_factory.cc
diff --git a/ios/chrome/browser/ntp_snippets/ios_chrome_content_suggestions_service_factory.cc b/ios/chrome/browser/ntp_snippets/ios_chrome_content_suggestions_service_factory.cc
index e36004cbfef3097bc06c636e9b9f26d5abfd75bb..3cd3611c801f551e33c643500577aa19fddd6abc 100644
--- a/ios/chrome/browser/ntp_snippets/ios_chrome_content_suggestions_service_factory.cc
+++ b/ios/chrome/browser/ntp_snippets/ios_chrome_content_suggestions_service_factory.cc
@@ -156,7 +156,7 @@ IOSChromeContentSuggestionsServiceFactory::BuildServiceInstanceFor(
             service->user_classifier(), scheduler,
             base::MakeUnique<NTPSnippetsFetcher>(
                 signin_manager, token_service, request_context, prefs,
-                service->category_factory(), base::Bind(&ParseJson),
+                service->category_factory(), nullptr, base::Bind(&ParseJson),
                 GetChannel() == version_info::Channel::STABLE
                     ? google_apis::GetAPIKey()
                     : google_apis::GetNonStableAPIKey()),