Standardize usage of virtual/override/final in cc/

cc/test/cc_test_suite.h

Index: cc/test/cc_test_suite.h
diff --git a/cc/test/cc_test_suite.h b/cc/test/cc_test_suite.h
index 6edcd6a8ff252ba12bcfe1f70a04a7f6534f413d..d2ad2b84a39ce1887ef9804a9bb26c07fdb2393c 100644
--- a/cc/test/cc_test_suite.h
+++ b/cc/test/cc_test_suite.h
@@ -18,12 +18,12 @@ namespace cc {
 class CCTestSuite : public base::TestSuite {
  public:
   CCTestSuite(int argc, char** argv);
-  virtual ~CCTestSuite();
+  ~CCTestSuite() override;
 
  protected:
   // Overridden from base::TestSuite:
-  virtual void Initialize() override;
-  virtual void Shutdown() override;
+  void Initialize() override;
+  void Shutdown() override;
 
  private:
   scoped_ptr<base::MessageLoop> message_loop_;