Commander: add to chrome://flags

Bug: 1014639
Change-Id: I130b0bff8cd41201c4f34b67732bb557b085c4ca
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2704601
Reviewed-by: Avi Drissman <[email protected]>
Commit-Queue: Leonard Grey <[email protected]>
Cr-Commit-Position: refs/heads/master@{#855910}
diff --git a/chrome/browser/ui/ui_features.h b/chrome/browser/ui/ui_features.h
index 8cf1956..ff881cc 100644
--- a/chrome/browser/ui/ui_features.h
+++ b/chrome/browser/ui/ui_features.h
@@ -27,6 +27,8 @@
 extern const base::Feature kChromeTipsInMainMenu;
 #endif
 
+extern const base::Feature kCommander;
+
 extern const base::Feature kEvDetailsInPageInfo;
 
 #if BUILDFLAG(ENABLE_EXTENSIONS)