WebUI NTP: enabled iframe OneGoogleBar by default

Bug: 1076506
Change-Id: Ifb53f33b23356cc614e2d551007e36bc50b08c23
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2628450
Commit-Queue: Esmael Elmoslimany <aee@chromium.org>
Commit-Queue: Tibor Goldschwendt <tiborg@chromium.org>
Auto-Submit: Esmael Elmoslimany <aee@chromium.org>
Reviewed-by: Tibor Goldschwendt <tiborg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843332}

components/search/ntp_features.cc

@@ -23,7 +23,7 @@ const base::Feature kDismissPromos{"DismissNtpPromos",
 
 // If enabled, the OneGooleBar is loaded in an iframe. Otherwise, it is inlined.
 const base::Feature kIframeOneGoogleBar{"IframeOneGoogleBar",
-                                        base::FEATURE_DISABLED_BY_DEFAULT};
+                                        base::FEATURE_ENABLED_BY_DEFAULT};
 
 // If enabled, queries that are frequently repeated by the user (and are
 // expected to be issued again) are shown as most visited tiles.