[Password manager] Relplace the FormFieldData vector from autofill::FormData with named fields…

components/autofill/core/common/form_data.h

Index: components/autofill/core/common/form_data.h
diff --git a/components/autofill/core/common/form_data.h b/components/autofill/core/common/form_data.h
index ffbc204b61bc864b2571619bbf780db71c57c21a..e360e1ede1225b93407c422a119f4b832fdb8985 100644
--- a/components/autofill/core/common/form_data.h
+++ b/components/autofill/core/common/form_data.h
@@ -35,6 +35,14 @@ struct FormData {
   GURL action;
   // true if this form was submitted by a user gesture and not javascript.
   bool user_submitted;
+
+  // Password form input fields.
+  FormFieldData username_field;
+  FormFieldData password_field;
+
+  // TODO (pritam.nikam): Make sure we remove |fields|, and add form fields
+  // for all possible autofillable input fields (http://crbug.com/417295).
+
   // A vector of all the input fields in the form.
   std::vector<FormFieldData> fields;
 };