[Autofill] Add a separate enumeration for HTML field type hints.

chrome/browser/autofill/form_structure_browsertest.cc

Index: chrome/browser/autofill/form_structure_browsertest.cc
diff --git a/chrome/browser/autofill/form_structure_browsertest.cc b/chrome/browser/autofill/form_structure_browsertest.cc
index aa8f085ef2b81ba115886c76809c409f721bc9f9..c497275511bbe3a1e94ac97d863e33bb0841285c 100644
--- a/chrome/browser/autofill/form_structure_browsertest.cc
+++ b/chrome/browser/autofill/form_structure_browsertest.cc
@@ -90,8 +90,7 @@ std::string FormStructureBrowserTest::FormStructuresToString(
             (*iter)->begin();
          field_iter != (*iter)->end();
          ++field_iter) {
-      forms_string +=
-          AutofillType::FieldTypeToString((*field_iter)->Type().server_type());
+      forms_string += (*field_iter)->Type().ToString();
       forms_string += " | " + UTF16ToUTF8((*field_iter)->name);
       forms_string += " | " + UTF16ToUTF8((*field_iter)->label);
       forms_string += " | " + UTF16ToUTF8((*field_iter)->value);