Standardize usage of virtual/override/final in chrome/

chrome/test/base/chrome_test_suite.h

Index: chrome/test/base/chrome_test_suite.h
diff --git a/chrome/test/base/chrome_test_suite.h b/chrome/test/base/chrome_test_suite.h
index 94809572f5979ed444b4f4940ba2b1bd9dd01f45..9c2883134175e98ca5f780bf9fb52a791a82cc65 100644
--- a/chrome/test/base/chrome_test_suite.h
+++ b/chrome/test/base/chrome_test_suite.h
@@ -16,12 +16,12 @@
 class ChromeTestSuite : public content::ContentTestSuiteBase {
  public:
   ChromeTestSuite(int argc, char** argv);
-  virtual ~ChromeTestSuite();
+  ~ChromeTestSuite() override;
 
  protected:
   // base::TestSuite overrides:
-  virtual void Initialize() override;
-  virtual void Shutdown() override;
+  void Initialize() override;
+  void Shutdown() override;
 
   void SetBrowserDirectory(const base::FilePath& browser_dir) {
     browser_dir_ = browser_dir;