Autofill database migration to clean up bogus profiles.

chrome/browser/autofill/autofill_country.h

 // Copyright (c) 2011 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 CHROME_BROWSER_AUTOFILL_AUTOFILL_COUNTRY_H_
 #define CHROME_BROWSER_AUTOFILL_AUTOFILL_COUNTRY_H_
 #pragma once
 
 #include <string>
 #include <vector>
@@ skipping 12 matching lines @@
 
   // Fills |country_codes| with a list of the available countries' codes.
   static void GetAvailableCountries(
       std::vector<std::string>* country_codes);
 
   // Returns the likely country code for |locale|, or "US" as a fallback if no
   // mapping from the locale is available.
   static const std::string CountryCodeForLocale(const std::string& locale);
 
   // Returns the country code corresponding to |country|, which should be a
-  // country code or country name localized to |locale|.
+  // country code or country name localized to |locale|.  This function can
+  // be expensive so use judiciously.
   static const std::string GetCountryCode(const string16& country,
                                           const std::string& locale);
 
   // Returns the application locale.
   static const std::string ApplicationLocale();
 
   const std::string country_code() const { return country_code_; }
   const string16 name() const { return name_; }
   const string16 postal_code_label() const { return postal_code_label_; }
   const string16 state_label() const { return state_label_; }
@@ skipping 13 matching lines @@
   // The localized label for the postal code (or zip code) field.
   string16 postal_code_label_;
 
   // The localized label for the state (or province, district, etc.) field.
   string16 state_label_;
 
   DISALLOW_COPY_AND_ASSIGN(AutofillCountry);
 };
 
 #endif  // CHROME_BROWSER_AUTOFILL_AUTOFILL_COUNTRY_H_