Standardize usage of virtual/override/final in content/

content/shell/tools/plugin/Tests/DocumentOpenInDestroyStream.cpp

 // Copyright 2014 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.
 
 /*
  * Copyright (C) 2010 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:
@@ skipping 26 matching lines @@
 
 class DocumentOpenInDestroyStream : public PluginTest {
 public:
     DocumentOpenInDestroyStream(NPP npp, const string& identifier)
         : PluginTest(npp, identifier)
         , m_shouldOpen(true)
     {
     }
 
 private:
-    virtual NPError NPP_DestroyStream(NPStream*, NPReason) override
-    {
+ NPError NPP_DestroyStream(NPStream*, NPReason) override {
         if (m_shouldOpen) {
             testDocumentOpen(m_npp);
             m_shouldOpen = false;
         }
 
         return NPERR_NO_ERROR;
     }
 
     bool m_shouldOpen;
 };
 
 static PluginTest::Register<DocumentOpenInDestroyStream> documentOpenInDestroyStream("document-open-in-destroy-stream");