Improve autofill form matching.

components/autofill/core/browser/autofill_manager.h

Index: components/autofill/core/browser/autofill_manager.h
diff --git a/components/autofill/core/browser/autofill_manager.h b/components/autofill/core/browser/autofill_manager.h
index ef345081537bae81fdf59b20849507f7f8137dcb..c774ef470cca945b5eb8f40ddb30147df33a6838 100644
--- a/components/autofill/core/browser/autofill_manager.h
+++ b/components/autofill/core/browser/autofill_manager.h
@@ -412,6 +412,9 @@ class AutofillManager : public AutofillDownloadManager::Observer,
   // Parses the forms using heuristic matching and querying the Autofill server.
   void ParseForms(const std::vector<FormData>& forms);
 
+  // Parses the form and adds it to |form_structures_|.
+  bool ParseForm(const FormData& form, FormStructure** parsed_form_structure);
+
   // Imports the form data, submitted by the user, into |personal_data_|.
   void ImportFormData(const FormStructure& submitted_form);