WebUI NTP: support OneGoogleBar modal and clipped overlays

Bug: 1084640
Change-Id: I21e89cbe3429c25f8a01f2cc0b79d5b5020c9024
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2209237
Commit-Queue: Esmael Elmoslimany <[email protected]>
Auto-Submit: Esmael Elmoslimany <[email protected]>
Reviewed-by: Lei Zhang <[email protected]>
Reviewed-by: Tibor Goldschwendt <[email protected]>
Cr-Commit-Position: refs/heads/master@{#770839}
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index de9bf1c..595ac54 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -1658,6 +1658,9 @@
 extern const char kNtpIframeOneGoogleBarName[];
 extern const char kNtpIframeOneGoogleBarDescription[];
 
+extern const char kNtpOneGoogleBarModalOverlaysName[];
+extern const char kNtpOneGoogleBarModalOverlaysDescription[];
+
 extern const char kNtpRealboxName[];
 extern const char kNtpRealboxDescription[];