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

content/renderer/pepper/pepper_file_ref_renderer_host.h

Index: content/renderer/pepper/pepper_file_ref_renderer_host.h
diff --git a/content/renderer/pepper/pepper_file_ref_renderer_host.h b/content/renderer/pepper/pepper_file_ref_renderer_host.h
index 3e91485c34d6b5d50136bf1f459fefbeb569805d..cfa36b2d83e00d0a5ae47f21be9bfe3c8b57ac9a 100644
--- a/content/renderer/pepper/pepper_file_ref_renderer_host.h
+++ b/content/renderer/pepper/pepper_file_ref_renderer_host.h
@@ -35,17 +35,17 @@ class PepperFileRefRendererHost : public ppapi::host::ResourceHost {
                             PP_Resource resource,
                             const base::FilePath& external_path);
 
-  virtual ~PepperFileRefRendererHost();
+  ~PepperFileRefRendererHost() override;
 
   PP_FileSystemType GetFileSystemType() const;
   GURL GetFileSystemURL() const;
   base::FilePath GetExternalFilePath() const;
 
   // ppapi::host::ResourceHost override.
-  virtual int32_t OnResourceMessageReceived(
+  int32_t OnResourceMessageReceived(
       const IPC::Message& msg,
       ppapi::host::HostMessageContext* context) override;
-  virtual bool IsFileRefHost() override;
+  bool IsFileRefHost() override;
 
  private:
   PP_FileSystemType file_system_type_;