Introduce feature flag for adding print servers

- Adds a feature flag for the print server UI for consumers in printer
  settings.

Bug: 1015628
Change-Id: I9b761e23d930775c35198fb072ba2664539476d1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1866860
Reviewed-by: Bailey Berro <[email protected]>
Commit-Queue: jimmy gong <[email protected]>
Cr-Commit-Position: refs/heads/master@{#708753}
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index 794bd76b..7eeb86ac 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -3620,6 +3620,10 @@
     "searches Chrome Web Store for extensions that support printing to a USB "
     "printer with specific USB ID.";
 
+const char kPrintServerUiName[] = "Print Server UI";
+const char kPrintServerUiDescription[] =
+    "Enables users to add their own print server in the printer settings page.";
+
 const char kReduceDisplayNotificationsName[] = "Reduce display notifications";
 const char kReduceDisplayNotificationsDescription[] =
     "If enabled, notifications for display rotation, display removed, display "