[Autofill] Fill from the last digits when filling a phone number with a maximum length.

components/autofill/core/browser/phone_number.h

 // 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.
 
 #ifndef COMPONENTS_AUTOFILL_CORE_BROWSER_PHONE_NUMBER_H_
 #define COMPONENTS_AUTOFILL_CORE_BROWSER_PHONE_NUMBER_H_
 
 #include <stddef.h>
 
 #include <string>
@@ skipping 29 matching lines @@
   bool SetInfo(const AutofillType& type,
                const base::string16& value,
                const std::string& app_locale) override;
 
   // Size and offset of the prefix and suffix portions of phone numbers.
   static const size_t kPrefixOffset = 0;
   static const size_t kPrefixLength = 3;
   static const size_t kSuffixOffset = 3;
   static const size_t kSuffixLength = 4;
 
+  // The size of a phone number consisting of the city code followed by the
+  // prefix and suffix portions of the phone number.
+  static const size_t kCityAndNumberLength = 10;
+
   // The class used to combine home phone parts into a whole number.
   class PhoneCombineHelper {
    public:
     PhoneCombineHelper();
     ~PhoneCombineHelper();
 
     // If |type| is a phone field type, saves the |value| accordingly and
     // returns true.  For all other field types returs false.
     bool SetInfo(const AutofillType& type, const base::string16& value);
 
@@ skipping 28 matching lines @@
   // Profile which stores the region used as hint when normalizing the number.
   const AutofillProfile* profile_;  // WEAK
 
   // Cached number.
   mutable i18n::PhoneObject cached_parsed_phone_;
 };
 
 }  // namespace autofill
 
 #endif  // COMPONENTS_AUTOFILL_CORE_BROWSER_PHONE_NUMBER_H_