[Autofill] Add the phone extension type.

components/autofill/core/browser/phone_field.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/autofill/core/browser/phone_field.h"
 
 #include <string.h>
 #include <utility>
 
 #include "base/logging.h"
@@ skipping 229 matching lines @@
       AddClassification(parsed_phone_fields_[FIELD_SUFFIX], PHONE_HOME_NUMBER,
                         kBasePhoneParserScore, field_candidates);
     }
   } else {
     AddClassification(parsed_phone_fields_[FIELD_PHONE],
                       PHONE_HOME_WHOLE_NUMBER, kBasePhoneParserScore,
                       field_candidates);
   }
 
   if (parsed_phone_fields_[FIELD_EXTENSION]) {
-    // TODO(crbug.com/589211): Change from UNKNOWN_TYPE to the proper
-    // ServerFieldType once the new phone suffix is checked in.
-    AddClassification(parsed_phone_fields_[FIELD_EXTENSION], UNKNOWN_TYPE,
-                      kBasePhoneParserScore, field_candidates);
+    AddClassification(parsed_phone_fields_[FIELD_EXTENSION],
+                      PHONE_HOME_EXTENSION, kBasePhoneParserScore,
+                      field_candidates);
   }
 }
 
 PhoneField::PhoneField() {
   memset(parsed_phone_fields_, 0, sizeof(parsed_phone_fields_));
 }
 
 // static
 std::string PhoneField::GetRegExp(RegexType regex_id) {
   switch (regex_id) {
@@ skipping 26 matching lines @@
 bool PhoneField::ParsePhoneField(AutofillScanner* scanner,
                                  const std::string& regex,
                                  AutofillField** field) {
   return ParseFieldSpecifics(scanner,
                              base::UTF8ToUTF16(regex),
                              MATCH_DEFAULT | MATCH_TELEPHONE | MATCH_NUMBER,
                              field);
 }
 
 }  // namespace autofill