Chrome OS OOBE: Use Gaia native navigation

Bug: 954572
Change-Id: Ic682f73b52a24c1acb0e40df200e0724160d2e82
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1774447Reviewed-by: Denis Kuznetsov <antrim@chromium.org>
Commit-Queue: Roman Sorokin [CET] <rsorokin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#692033}

chrome/browser/resources/gaia_auth_host/authenticator.js

@@ -596,6 +596,9 @@ cr.define('cr.login', function() {
       if (data.ignoreCrOSIdpSetting === true) {
         url = appendParam(url, 'ignoreCrOSIdpSetting', 'true');
       }
+      if (data.enableGaiaActionButtons) {
+        url = appendParam(url, 'use_native_navigation', 1);
+      }
       return url;
     }