Generalize migration code in WebDatabase.

chrome/browser/webdata/autofill_table.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_WEBDATA_AUTOFILL_TABLE_H_
 #define CHROME_BROWSER_WEBDATA_AUTOFILL_TABLE_H_
 
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/string16.h"
@@ skipping 100 matching lines @@
 //   card_number_encrypted Stores encrypted credit card number.
 //   date_modified      The date on which this entry was last modified.
 //                      Added in version 30.
 //
 class AutofillTable : public WebDatabaseTable {
  public:
   AutofillTable(sql::Connection* db, sql::MetaTable* meta_table);
   virtual ~AutofillTable();
   virtual bool Init() OVERRIDE;
   virtual bool IsSyncable() OVERRIDE;
+  virtual bool MigrateToVersion(int version,
+                                const std::string& app_locale,
+                                bool* update_compatible_version) OVERRIDE;
 
   // Records the form elements in |elements| in the database in the
   // autofill table.  A list of all added and updated autofill entries
   // is returned in the changes out parameter.
   bool AddFormFieldValues(const std::vector<FormFieldData>& elements,
                           std::vector<AutofillChange>* changes);
 
   // Records a single form element in the database in the autofill table. A list
   // of all added and updated autofill entries is returned in the changes out
   // parameter.
@@ skipping 213 matching lines @@
   bool InitProfilesTable();
   bool InitProfileNamesTable();
   bool InitProfileEmailsTable();
   bool InitProfilePhonesTable();
   bool InitProfileTrashTable();
 
   DISALLOW_COPY_AND_ASSIGN(AutofillTable);
 };
 
 #endif  // CHROME_BROWSER_WEBDATA_AUTOFILL_TABLE_H_