[Local NTP] Fix LocalNTP tests, and re-enable them.

chrome/browser/ui/search/instant_test_utils.h

Index: chrome/browser/ui/search/instant_test_utils.h
diff --git a/chrome/browser/ui/search/instant_test_utils.h b/chrome/browser/ui/search/instant_test_utils.h
index c5e79bc286d0c5c631ceb357cb4c1a2563217afa..1a63cc6847495ab4ca0e7e402ae3b592e35a38c8 100644
--- a/chrome/browser/ui/search/instant_test_utils.h
+++ b/chrome/browser/ui/search/instant_test_utils.h
@@ -62,6 +62,8 @@ class InstantTestBase {
 
   const GURL& instant_url() const { return instant_url_; }
 
+  const GURL& ntp_url() const { return ntp_url_; }
+
   net::SpawnedTestServer& https_test_server() { return https_test_server_; }
 
   void KillInstantRenderView();