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

chrome/browser/renderer_host/pepper/pepper_flash_drm_host.h

 // Copyright (c) 2013 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_FLASH_DRM_HOST_H_
 #define CHROME_BROWSER_RENDERER_HOST_PEPPER_PEPPER_FLASH_DRM_HOST_H_
 
 #include <string>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 10 matching lines @@
 }
 
 namespace chrome {
 class MonitorFinder;
 
 class PepperFlashDRMHost : public ppapi::host::ResourceHost {
  public:
   PepperFlashDRMHost(content::BrowserPpapiHost* host,
                      PP_Instance instance,
                      PP_Resource resource);
-  virtual ~PepperFlashDRMHost();
+  ~PepperFlashDRMHost() override;
 
   // ResourceHost override.
-  virtual int32_t OnResourceMessageReceived(
+  int32_t OnResourceMessageReceived(
       const IPC::Message& msg,
       ppapi::host::HostMessageContext* context) override;
 
  private:
   // IPC message handler.
   int32_t OnHostMsgGetDeviceID(ppapi::host::HostMessageContext* context);
   int32_t OnHostMsgGetHmonitor(ppapi::host::HostMessageContext* context);
   int32_t OnHostMsgMonitorIsExternal(ppapi::host::HostMessageContext* context);
 
   // Called by the fetcher when the device ID was retrieved, or the empty string
   // on error.
   void GotDeviceID(ppapi::host::ReplyMessageContext reply_context,
                    const std::string& id,
                    int32_t result);
 
   scoped_refptr<DeviceIDFetcher> fetcher_;
   scoped_refptr<MonitorFinder> monitor_finder_;
 
   base::WeakPtrFactory<PepperFlashDRMHost> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PepperFlashDRMHost);
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_RENDERER_HOST_PEPPER_PEPPER_FLASH_DRM_HOST_H_