Raze old WebDatabases.

components/webdata/common/web_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 COMPONENTS_WEBDATA_COMMON_WEB_DATABASE_H_
 #define COMPONENTS_WEBDATA_COMMON_WEB_DATABASE_H_
 
 #include <map>
 
 #include "base/memory/scoped_ptr.h"
 #include "components/webdata/common/web_database_table.h"
 #include "components/webdata/common/webdata_export.h"
 #include "sql/connection.h"
 #include "sql/init_status.h"
 #include "sql/meta_table.h"
 
 namespace base {
 class FilePath;
 }
 
 // This class manages a SQLite database that stores various web page meta data.
 class WEBDATA_EXPORT WebDatabase {
  public:
   enum State {
     COMMIT_NOT_NEEDED,
     COMMIT_NEEDED
   };
   // Exposed publicly so the keyword table can access it.
   static const int kCurrentVersionNumber;
+  // The newest version of the database Chrome will NOT try to migrate.
+  static const int kDeprecatedVersionNumber;
 
   WebDatabase();
   virtual ~WebDatabase();
 
   // Adds a database table. Ownership remains with the caller, which
   // must ensure that the lifetime of |table| exceeds this object's
   // lifetime. Must only be called before Init.
   void AddTable(WebDatabaseTable* table);
 
   // Retrieves a table based on its |key|.
@@ skipping 36 matching lines @@
 
   // Map of all the different tables that have been added to this
   // object. Non-owning.
   typedef std::map<WebDatabaseTable::TypeKey, WebDatabaseTable*> TableMap;
   TableMap tables_;
 
   DISALLOW_COPY_AND_ASSIGN(WebDatabase);
 };
 
 #endif  // COMPONENTS_WEBDATA_COMMON_WEB_DATABASE_H_