Standardize usage of virtual/override/final in net/

net/test/embedded_test_server/http_response.h

Index: net/test/embedded_test_server/http_response.h
diff --git a/net/test/embedded_test_server/http_response.h b/net/test/embedded_test_server/http_response.h
index 2172354bb2ead14a51c5aecf9345e29c8ef29e8c..821c02757dc0e2e1c81475b102d410a4b8f57317 100644
--- a/net/test/embedded_test_server/http_response.h
+++ b/net/test/embedded_test_server/http_response.h
@@ -32,7 +32,7 @@ class HttpResponse{
 class BasicHttpResponse : public HttpResponse {
  public:
   BasicHttpResponse();
-  virtual ~BasicHttpResponse();
+  ~BasicHttpResponse() override;
 
   // The response code.
   HttpStatusCode code() const { return code_; }
@@ -54,7 +54,7 @@ class BasicHttpResponse : public HttpResponse {
   }
 
   // Generates and returns a http response string.
-  virtual std::string ToResponseString() const override;
+  std::string ToResponseString() const override;
 
  private:
   HttpStatusCode code_;