WebUI: create feature flag for accessibility enhancements used for
review and testings before releasing the enhancement

Bug: 1001742
Change-Id: I30774fa496ff566cecb8f33db1179ad0ae746bb1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1790410
Reviewed-by: Dan Beam <[email protected]>
Reviewed-by: Avi Drissman <[email protected]>
Reviewed-by: Lei Zhang <[email protected]>
Commit-Queue: Esmael Elmoslimany <[email protected]>
Cr-Commit-Position: refs/heads/master@{#696088}
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index b9a63a5..f218e1a 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -1718,6 +1718,9 @@
 extern const char kProactiveTabFreezeAndDiscardName[];
 extern const char kProactiveTabFreezeAndDiscardDescription[];
 
+extern const char kWebUIA11yEnhancementsName[];
+extern const char kWebUIA11yEnhancementsDescription[];
+
 #if defined(GOOGLE_CHROME_BUILD)
 
 extern const char kGoogleBrandedContextMenuName[];