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

components/autofill/content/renderer/autofill_agent.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/autofill/content/renderer/autofill_agent.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "base/strings/string_split.h"
@@ skipping 710 matching lines @@
   node->setSelectionRange(node->value().length(),
                           node->suggestedValue().length());
 }
 
 void AutofillAgent::ProcessForms() {
   // Record timestamp of when the forms are first seen. This is used to
   // measure the overhead of the Autofill feature.
   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));
   }
 }
 
 void AutofillAgent::HidePopup() {
   if (!is_popup_possibly_visible_)
     return;
 
   if (!element_.isNull())
     OnClearPreviewedForm();
@@ skipping 37 matching lines @@
 void AutofillAgent::LegacyAutofillAgent::FocusedNodeChanged(
     const WebNode& node) {
   agent_->FocusedNodeChanged(node);
 }
 
 void AutofillAgent::LegacyAutofillAgent::Resized() {
   agent_->Resized();
 }
 
 }  // namespace autofill