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

chrome/browser/renderer_host/pepper/pepper_broker_message_filter.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 CHROME_BROWSER_RENDERER_HOST_PEPPER_PEPPER_BROKER_MESSAGE_FILTER_H_
 #define CHROME_BROWSER_RENDERER_HOST_PEPPER_PEPPER_BROKER_MESSAGE_FILTER_H_
 
 #include "base/compiler_specific.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/host/resource_message_filter.h"
@@ skipping 11 matching lines @@
 
 namespace chrome {
 
 // This filter handles messages for the PepperBrokerHost on the UI thread.
 class PepperBrokerMessageFilter : public ppapi::host::ResourceMessageFilter {
  public:
   PepperBrokerMessageFilter(PP_Instance instance,
                             content::BrowserPpapiHost* host);
 
  private:
-  virtual ~PepperBrokerMessageFilter();
+  ~PepperBrokerMessageFilter() override;
 
   // ppapi::host::ResourceMessageFilter overrides.
-  virtual scoped_refptr<base::TaskRunner> OverrideTaskRunnerForMessage(
+  scoped_refptr<base::TaskRunner> OverrideTaskRunnerForMessage(
       const IPC::Message& message) override;
-  virtual int32_t OnResourceMessageReceived(
+  int32_t OnResourceMessageReceived(
       const IPC::Message& msg,
       ppapi::host::HostMessageContext* context) override;
 
   int32_t OnIsAllowed(ppapi::host::HostMessageContext* context);
 
   int render_process_id_;
   GURL document_url_;
 
   DISALLOW_COPY_AND_ASSIGN(PepperBrokerMessageFilter);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_PEPPER_PEPPER_BROKER_MESSAGE_FILTER_H_