Upgrade the history database to version 23

chrome/browser/history/android/android_urls_database.h

 // Copyright (c) 2012 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_HISTORY_ANDROID_ANDROID_URLS_DATABASE_H_
 #define CHROME_BROWSER_HISTORY_ANDROID_ANDROID_URLS_DATABASE_H_
 
 #include "chrome/browser/history/android/android_history_types.h"
 
 namespace history {
@@ skipping 38 matching lines @@
   // Updates the row of |id| with the given |raw_url| and |url_id|. Returns true
   // on success.
   bool UpdateAndroidURLRow(AndroidURLID id,
                            const std::string&raw_url,
                            URLID url_id);
 
   // Clears all the rows in android_urls table, returns true on success, false
   // on error.
   bool ClearAndroidURLRows();
 
+  // Migrate from version 21 to 22.
+  bool MigrateToVersion22();
+
  protected:
   // Returns the database for the functions in this interface. The decendent of
   // this class implements these functions to return its objects.
   virtual sql::Connection& GetDB() = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AndroidURLsDatabase);
 };
 
 }  // namespace history
 
 #endif  // CHROME_BROWSER_HISTORY_ANDROID_ANDROID_URLS_DATABASE_H_