Standardize usage of virtual/override/final specifiers.

remoting/protocol/authenticator_test_base.h

Index: remoting/protocol/authenticator_test_base.h
diff --git a/remoting/protocol/authenticator_test_base.h b/remoting/protocol/authenticator_test_base.h
index f8b7e25394d00f91cf8bcc05c88641b8cff4e917..02e7de9ec04342e31fe22fa1f5d42c67778363c9 100644
--- a/remoting/protocol/authenticator_test_base.h
+++ b/remoting/protocol/authenticator_test_base.h
@@ -29,7 +29,7 @@ class FakeStreamSocket;
 class AuthenticatorTestBase : public testing::Test {
  public:
   AuthenticatorTestBase();
-  virtual ~AuthenticatorTestBase();
+  ~AuthenticatorTestBase() override;
 
  protected:
   class MockChannelDoneCallback {
@@ -43,7 +43,7 @@ class AuthenticatorTestBase : public testing::Test {
                                        Authenticator* receiver,
                                        bool sender_started,
                                        bool receiver_srated);
-  virtual void SetUp() override;
+  void SetUp() override;
   void RunAuthExchange();
   void RunHostInitiatedAuthExchange();
   void RunChannelAuth(bool expected_fail);