[Autofill] Add the phone extension type.

components/autofill/core/browser/form_structure.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/form_structure.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 #include <map>
@@ skipping 256 matching lines @@
 
   if (autocomplete_attribute_value == "tel-local")
     return HTML_TYPE_TEL_LOCAL;
 
   if (autocomplete_attribute_value == "tel-local-prefix")
     return HTML_TYPE_TEL_LOCAL_PREFIX;
 
   if (autocomplete_attribute_value == "tel-local-suffix")
     return HTML_TYPE_TEL_LOCAL_SUFFIX;
 
+  if (autocomplete_attribute_value == "tel-extension")
+    return HTML_TYPE_TEL_EXTENSION;
+
   if (autocomplete_attribute_value == "email")
     return HTML_TYPE_EMAIL;
 
   return HTML_TYPE_UNRECOGNIZED;
 }
 
 std::string StripDigitsIfRequired(const base::string16& input) {
   std::string return_string = base::UTF16ToUTF8(input);
 
   re2::RE2::GlobalReplace(&return_string, re2::RE2(kIgnorePatternInFieldName),
@@ skipping 1040 matching lines @@
               filtered_strings[0].at(prefix_len)) {
         // Mismatch found.
         return filtered_strings[i].substr(0, prefix_len);
       }
     }
   }
   return filtered_strings[0];
 }
 
 }  // namespace autofill