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

components/autofill/core/browser/form_group.cc

Index: components/autofill/core/browser/form_group.cc
diff --git a/components/autofill/core/browser/form_group.cc b/components/autofill/core/browser/form_group.cc
index a803871893b8976159667ee33a2d947e9eb6dc69..c73cc556df090b8f78df8c096a1ea5b6431afb4c 100644
--- a/components/autofill/core/browser/form_group.cc
+++ b/components/autofill/core/browser/form_group.cc
@@ -38,13 +38,13 @@ void FormGroup::GetNonEmptyTypes(const std::string& app_locale,
 
 base::string16 FormGroup::GetInfo(const AutofillType& type,
                                   const std::string& app_locale) const {
-  return GetRawInfo(type.native_type());
+  return GetRawInfo(type.GetEquivalentNativeType());
 }
 
 bool FormGroup::SetInfo(const AutofillType& type,
                         const base::string16& value,
                         const std::string& app_locale) {
-  SetRawInfo(type.native_type(), value);
+  SetRawInfo(type.GetEquivalentNativeType(), value);
   return true;
 }