[Autofill] Move IsValidState() into validation.h

components/autofill/browser/validation.cc

 // Copyright (c) 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/browser/validation.h"
 
 #include "base/string_util.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "components/autofill/browser/autofill_regexes.h"
 #include "components/autofill/browser/credit_card.h"
+#include "components/autofill/browser/state_names.h"
 
 namespace autofill {
 
 bool IsValidCreditCardExpirationDate(const base::string16& year,
                                      const base::string16& month,
                                      const base::Time& now) {
   base::string16 year_cleaned, month_cleaned;
   TrimWhitespace(year, TRIM_ALL, &year_cleaned);
   TrimWhitespace(month, TRIM_ALL, &month_cleaned);
   if (year_cleaned.length() != 4)
@@ skipping 80 matching lines @@
 }
 
 bool IsValidEmailAddress(const base::string16& text) {
   // E-Mail pattern as defined by the WhatWG. (4.10.7.1.5 E-Mail state)
   const base::string16 kEmailPattern = ASCIIToUTF16(
       "^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@"
       "[a-zA-Z0-9-]+(?:\\.[a-zA-Z0-9-]+)*$");
   return MatchesPattern(text, kEmailPattern);
 }
 
-bool IsValidZip(const base::string16& value) {
+bool IsValidState(const base::string16& text) {
+  return !state_names::GetAbbreviationForName(text).empty() ||
+         !state_names::GetNameForAbbreviation(text).empty();
+}
+
+bool IsValidZip(const base::string16& text) {
   const base::string16 kZipPattern = ASCIIToUTF16("^\\d{5}(-\\d{4})?$");
-  return MatchesPattern(value, kZipPattern);
+  return MatchesPattern(text, kZipPattern);
 }
 
 }  // namespace autofill