Fix virtual/override/final usage in Source/modules/.

Source/modules/webdatabase/DatabaseManager.cpp

 /*
  * Copyright (C) 2012 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 65 matching lines @@
 {
 }
 
 class DatabaseCreationCallbackTask final : public ExecutionContextTask {
 public:
     static PassOwnPtr<DatabaseCreationCallbackTask> create(Database* database, DatabaseCallback* creationCallback)
     {
         return adoptPtr(new DatabaseCreationCallbackTask(database, creationCallback));
     }
 
-    virtual void performTask(ExecutionContext*) override
+    void performTask(ExecutionContext*) override
     {
         m_creationCallback->handleEvent(m_database.get());
     }
 
-    virtual String taskNameForInstrumentation() const override
+    String taskNameForInstrumentation() const override
     {
         return "openDatabase";
     }
 
 private:
     DatabaseCreationCallbackTask(Database* database, DatabaseCallback* callback)
         : m_database(database)
         , m_creationCallback(callback)
     {
     }
@@ skipping 129 matching lines @@
 {
     return DatabaseTracker::tracker().fullPathForDatabase(origin, name, createIfDoesNotExist);
 }
 
 void DatabaseManager::logErrorMessage(ExecutionContext* context, const String& message)
 {
     context->addConsoleMessage(ConsoleMessage::create(StorageMessageSource, ErrorMessageLevel, message));
 }
 
 } // namespace blink