Standardize usage of virtual/override/final in remoting/

remoting/base/url_request_context_getter.h

Index: remoting/base/url_request_context_getter.h
diff --git a/remoting/base/url_request_context_getter.h b/remoting/base/url_request_context_getter.h
index d35b021e30f9bf08f28fb81de4c1d8d7b5794ea1..bba530ff1699554644daa6442b305befbd6dc3ea 100644
--- a/remoting/base/url_request_context_getter.h
+++ b/remoting/base/url_request_context_getter.h
@@ -26,12 +26,12 @@ class URLRequestContextGetter : public net::URLRequestContextGetter {
       scoped_refptr<base::SingleThreadTaskRunner> file_task_runner);
 
   // Overridden from net::URLRequestContextGetter:
-  virtual net::URLRequestContext* GetURLRequestContext() override;
-  virtual scoped_refptr<base::SingleThreadTaskRunner>
-      GetNetworkTaskRunner() const override;
+  net::URLRequestContext* GetURLRequestContext() override;
+  scoped_refptr<base::SingleThreadTaskRunner> GetNetworkTaskRunner()
+      const override;
 
  protected:
-  virtual ~URLRequestContextGetter();
+  ~URLRequestContextGetter() override;
 
  private:
   scoped_refptr<base::SingleThreadTaskRunner> network_task_runner_;