[Sync] Filter out types that can't be synced at configure time.

ios/chrome/browser/sync/ios_chrome_sync_client.mm

Index: ios/chrome/browser/sync/ios_chrome_sync_client.mm
diff --git a/ios/chrome/browser/sync/ios_chrome_sync_client.mm b/ios/chrome/browser/sync/ios_chrome_sync_client.mm
index 79d38cd0bd05029170ac21e75a5c1842f647e765..5ed9a2bd41c21860113d2f7ea313d5b195f5f1c3 100644
--- a/ios/chrome/browser/sync/ios_chrome_sync_client.mm
+++ b/ios/chrome/browser/sync/ios_chrome_sync_client.mm
@@ -202,6 +202,11 @@ history::HistoryService* IOSChromeSyncClient::GetHistoryService() {
       browser_state_, ServiceAccessType::EXPLICIT_ACCESS);
 }
 
+bool IOSChromeSyncClient::HasPasswordStore() {
+  DCHECK_CURRENTLY_ON(web::WebThread::UI);
+  return password_store_ != nullptr;
+}
+
 autofill::PersonalDataManager* IOSChromeSyncClient::GetPersonalDataManager() {
   DCHECK_CURRENTLY_ON(web::WebThread::UI);
   return autofill::PersonalDataManagerFactory::GetForBrowserState(