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

components/autofill/core/browser/autofill_manager.cc

Index: components/autofill/core/browser/autofill_manager.cc
diff --git a/components/autofill/core/browser/autofill_manager.cc b/components/autofill/core/browser/autofill_manager.cc
index 67e7636cd2384468e8361012f5640d57009e0f0b..90c3170282e932c8871ea416f508734fea564c53 100644
--- a/components/autofill/core/browser/autofill_manager.cc
+++ b/components/autofill/core/browser/autofill_manager.cc
@@ -382,7 +382,11 @@ bool AutofillManager::OnFormSubmitted(const FormData& form,
 }
 
 void AutofillManager::OnFormsSeen(const std::vector<FormData>& forms,
+                                  size_t unowned_form_index,
                                   const TimeTicks& timestamp) {
+  if (unowned_form_index > forms.size())
+    return;
+
   if (!IsValidFormDataVector(forms))
     return;
 
@@ -402,7 +406,7 @@ void AutofillManager::OnFormsSeen(const std::vector<FormData>& forms,
     forms_loaded_timestamps_[forms[i]] = timestamp;
   }
 
-  ParseForms(forms);
+  ParseForms(forms, unowned_form_index);
 }
 
 void AutofillManager::OnTextFieldDidChange(const FormData& form,
@@ -1207,14 +1211,17 @@ std::vector<Suggestion> AutofillManager::GetCreditCardSuggestions(
   return suggestions;
 }
 
-void AutofillManager::ParseForms(const std::vector<FormData>& forms) {
+void AutofillManager::ParseForms(const std::vector<FormData>& forms,
+                                 size_t unowned_form_index) {
   std::vector<FormStructure*> non_queryable_forms;
-  for (std::vector<FormData>::const_iterator iter = forms.begin();
-       iter != forms.end(); ++iter) {
-    scoped_ptr<FormStructure> form_structure(new FormStructure(*iter));
+  for (size_t i = 0; i < forms.size(); ++i) {
+    scoped_ptr<FormStructure> form_structure(new FormStructure(forms[i]));
     if (!form_structure->ShouldBeParsed())
       continue;
 
+    if (i == unowned_form_index)
+      form_structure->set_is_unowned();
+
     form_structure->DetermineHeuristicTypes();
 
     if (form_structure->ShouldBeCrowdsourced())