Autofill: Set requirements for number of recognized fields in an autofillable form

components/autofill/content/renderer/autofill_agent.cc

Index: components/autofill/content/renderer/autofill_agent.cc
diff --git a/components/autofill/content/renderer/autofill_agent.cc b/components/autofill/content/renderer/autofill_agent.cc
index 93d06956d917760add230ba81f0eb63f860ada7f..2a728a0537cc8de88ff827019c97d0b7b0e448a1 100644
--- a/components/autofill/content/renderer/autofill_agent.cc
+++ b/components/autofill/content/renderer/autofill_agent.cc
@@ -737,11 +737,13 @@ void AutofillAgent::ProcessForms() {
   base::TimeTicks forms_seen_timestamp = base::TimeTicks::Now();
 
   WebLocalFrame* frame = render_frame()->GetWebFrame();
-  std::vector<FormData> forms = form_cache_.ExtractNewForms();
+  size_t unowned_form_index;
+  std::vector<FormData> forms =
+      form_cache_.ExtractNewForms(&unowned_form_index);
 
   // Always communicate to browser process for topmost frame.
   if (!forms.empty() || !frame->parent()) {
-    Send(new AutofillHostMsg_FormsSeen(routing_id(), forms,
+    Send(new AutofillHostMsg_FormsSeen(routing_id(), forms, unowned_form_index,
                                        forms_seen_timestamp));
   }
 }