Add preliminary Autofill support for 'autocompletetype' sections.

chrome/browser/autofill/autofill_field.h

Index: chrome/browser/autofill/autofill_field.h
diff --git a/chrome/browser/autofill/autofill_field.h b/chrome/browser/autofill/autofill_field.h
index a875c9944bfe48823fd15d45c57ae9c8fd4cd12e..08ed126ad1d457b09099170ecd965319dfbeec7b 100644
--- a/chrome/browser/autofill/autofill_field.h
+++ b/chrome/browser/autofill/autofill_field.h
@@ -22,11 +22,13 @@ class AutofillField : public webkit_glue::FormField {
 
   const string16& unique_name() const { return unique_name_; }
 
+  const string16& section() const { return section_; }
   AutofillFieldType heuristic_type() const { return heuristic_type_; }
   AutofillFieldType server_type() const { return server_type_; }
   const FieldTypeSet& possible_types() const { return possible_types_; }
 
   // Sets the heuristic type of this field, validating the input.
+  void set_section(const string16& section) { section_ = section; }
   void set_heuristic_type(AutofillFieldType type);
   void set_server_type(AutofillFieldType type) { server_type_ = type; }
   void set_possible_types(const FieldTypeSet& possible_types) {
@@ -52,6 +54,10 @@ class AutofillField : public webkit_glue::FormField {
   // The unique name of this field, generated by Autofill.
   string16 unique_name_;
 
+  // The unique identifier for the section (e.g. billing vs. shipping address)
+  // that this field belongs to.
+  string16 section_;
+
   // The type of the field, as determined by the Autofill server.
   AutofillFieldType server_type_;