Standardize usage of virtual/override/final in chrome/

chrome/test/chromedriver/session_unittest.cc

Index: chrome/test/chromedriver/session_unittest.cc
diff --git a/chrome/test/chromedriver/session_unittest.cc b/chrome/test/chromedriver/session_unittest.cc
index 14485f50d644cc35ae7c2f13a160b52c0fa2ccb5..83230612a46cce4c48be054188820cd1e6ab2569 100644
--- a/chrome/test/chromedriver/session_unittest.cc
+++ b/chrome/test/chromedriver/session_unittest.cc
@@ -16,10 +16,9 @@ namespace {
 class MockChrome : public StubChrome {
  public:
   MockChrome() : web_view_("1") {}
-  virtual ~MockChrome() {}
+  ~MockChrome() override {}
 
-  virtual Status GetWebViewById(const std::string& id,
-                                WebView** web_view) override {
+  Status GetWebViewById(const std::string& id, WebView** web_view) override {
     if (id == web_view_.GetId()) {
       *web_view = &web_view_;
       return Status(kOk);