Add Files App rar2fs feature flag

Bug: 996549
Change-Id: I6ed2ea70e4c68b996647a98457028cf55917f405
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2046423
Commit-Queue: François Degros <[email protected]>
Reviewed-by: Anand Mistry <[email protected]>
Cr-Commit-Position: refs/heads/master@{#739791}
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index 0e1495b..1ee24b9 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -2026,6 +2026,9 @@
 extern const char kPrintServerUiName[];
 extern const char kPrintServerUiDescription[];
 
+extern const char kRar2FsName[];
+extern const char kRar2FsDescription[];
+
 extern const char kReduceDisplayNotificationsName[];
 extern const char kReduceDisplayNotificationsDescription[];