Standardize usage of virtual/override/final in chrome/

chrome/test/chromedriver/net/net_util.cc

Index: chrome/test/chromedriver/net/net_util.cc
diff --git a/chrome/test/chromedriver/net/net_util.cc b/chrome/test/chromedriver/net/net_util.cc
index 518c2369f20b5c69bc6d192d380d46bbc44ab5ff..401b20dc2494724cff7a9ee204ce95f3fa3e1940 100644
--- a/chrome/test/chromedriver/net/net_util.cc
+++ b/chrome/test/chromedriver/net/net_util.cc
@@ -26,7 +26,7 @@ class SyncUrlFetcher : public net::URLFetcherDelegate {
                  std::string* response)
       : url_(url), getter_(getter), response_(response), event_(false, false) {}
 
-  virtual ~SyncUrlFetcher() {}
+  ~SyncUrlFetcher() override {}
 
   bool Fetch() {
     getter_->GetNetworkTaskRunner()->PostTask(
@@ -42,7 +42,7 @@ class SyncUrlFetcher : public net::URLFetcherDelegate {
     fetcher_->Start();
   }
 
-  virtual void OnURLFetchComplete(const net::URLFetcher* source) override {
+  void OnURLFetchComplete(const net::URLFetcher* source) override {
     success_ = (source->GetResponseCode() == 200);
     if (success_)
       success_ = source->GetResponseAsString(response_);