Standardize usage of virtual/override/final in content/browser/

content/browser/renderer_host/pepper/pepper_browser_font_singleton_host.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 CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_BROWSER_FONT_SINGLETON_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_BROWSER_FONT_SINGLETON_HOST_H_
 
 #include "base/basictypes.h"
 #include "ppapi/host/resource_host.h"
 
 namespace content {
 
 class BrowserPpapiHost;
 
 class PepperBrowserFontSingletonHost : public ppapi::host::ResourceHost {
  public:
   PepperBrowserFontSingletonHost(BrowserPpapiHost* host,
                                  PP_Instance instance,
                                  PP_Resource resource);
-  virtual ~PepperBrowserFontSingletonHost();
+  ~PepperBrowserFontSingletonHost() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(PepperBrowserFontSingletonHost);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_PEPPER_PEPPER_BROWSER_FONT_SINGLETON_HOST_H_