Standardize usage of virtual/override/final in chrome/

chrome/test/base/chrome_unit_test_suite.h

Index: chrome/test/base/chrome_unit_test_suite.h
diff --git a/chrome/test/base/chrome_unit_test_suite.h b/chrome/test/base/chrome_unit_test_suite.h
index e0208158cc72af3e594b83f45fe500f2e78ec778..a8bb20886f92fc5e973d0bb318d90cc48ef1b61f 100644
--- a/chrome/test/base/chrome_unit_test_suite.h
+++ b/chrome/test/base/chrome_unit_test_suite.h
@@ -15,11 +15,11 @@
 class ChromeUnitTestSuite : public ChromeTestSuite {
  public:
   ChromeUnitTestSuite(int argc, char** argv);
-  virtual ~ChromeUnitTestSuite();
+  ~ChromeUnitTestSuite() override;
 
   // base::TestSuite overrides:
-  virtual void Initialize() override;
-  virtual void Shutdown() override;
+  void Initialize() override;
+  void Shutdown() override;
 
   // These methods allow unit tests which run in the browser_test binary, and so
   // which don't exercise the initialization in this test suite, to do basic