Remove unused SQLLite tables from WebData

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"
@@ skipping 41 matching lines @@
   void CommitTransaction();
 
   // Exposed for testing only.
   sql::Connection* GetSQLConnection();
 
  private:
   // Used by |Init()| to migration database schema from older versions to
   // current version.
   sql::InitStatus MigrateOldVersionsAsNeeded();
 
+  // Migrates this database to |version|. Returns false if there was
+  // migration work to do and it failed, true otherwise.
+  //
+  // Implementations may set |*update_compatible_version| to true if
+  // the compatible version should be changed to |version|.
+  // Implementations should otherwise not modify this parameter.
+  bool MigrateToVersion(int version,
+                        bool* update_compatible_version);
+
+  // Migration method for version 58.
+  bool MigrateToVersion58DropWebAppsAndIntents();
+
   sql::Connection db_;
   sql::MetaTable meta_table_;
 
   // 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_