[AF] Adds flags for restricting formless form extraction to about_flags

Bug: 834404
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: I95e93dfae14271e2cd08a42685b8e3f3ad9ff169
Reviewed-on: https://chromium-review.googlesource.com/1022076
Reviewed-by: Roger McFarlane <[email protected]>
Commit-Queue: Moe Ahmadi <[email protected]>
Cr-Commit-Position: refs/heads/master@{#552437}
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index 731d442..a8fcfec 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -67,6 +67,9 @@
 extern const char kAutofillDynamicFormsName[];
 extern const char kAutofillDynamicFormsDescription[];
 
+extern const char kAutofillRestrictUnownedFieldsToFormlessCheckoutName[];
+extern const char kAutofillRestrictUnownedFieldsToFormlessCheckoutDescription[];
+
 extern const char kAutoplayPolicyName[];
 extern const char kAutoplayPolicyDescription[];