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

content/renderer/pepper/pepper_file_system_host.h

Index: content/renderer/pepper/pepper_file_system_host.h
diff --git a/content/renderer/pepper/pepper_file_system_host.h b/content/renderer/pepper/pepper_file_system_host.h
index 79fcf31ec03003c4c847c32acc6ea6d7d30b362b..23d7c49a2cb8061d2f29659382be60813dfd6906 100644
--- a/content/renderer/pepper/pepper_file_system_host.h
+++ b/content/renderer/pepper/pepper_file_system_host.h
@@ -39,13 +39,13 @@ class PepperFileSystemHost
                        PP_Resource resource,
                        const GURL& root_url,
                        PP_FileSystemType type);
-  virtual ~PepperFileSystemHost();
+  ~PepperFileSystemHost() override;
 
   // ppapi::host::ResourceHost override.
-  virtual int32_t OnResourceMessageReceived(
+  int32_t OnResourceMessageReceived(
       const IPC::Message& msg,
       ppapi::host::HostMessageContext* context) override;
-  virtual bool IsFileSystemHost() override;
+  bool IsFileSystemHost() override;
 
   // Supports FileRefs direct access on the host side.
   PP_FileSystemType GetType() const { return type_; }