Standardize usage of virtual/override/final specifiers.

remoting/protocol/ssl_hmac_channel_authenticator_unittest.cc

Index: remoting/protocol/ssl_hmac_channel_authenticator_unittest.cc
diff --git a/remoting/protocol/ssl_hmac_channel_authenticator_unittest.cc b/remoting/protocol/ssl_hmac_channel_authenticator_unittest.cc
index 2f87cd4b63697dbee812a6404f62af013997b26b..26a5844c73edb7969375b47ef933894a553189ec 100644
--- a/remoting/protocol/ssl_hmac_channel_authenticator_unittest.cc
+++ b/remoting/protocol/ssl_hmac_channel_authenticator_unittest.cc
@@ -51,10 +51,10 @@ ACTION_P(QuitThreadOnCounter, counter) {
 class SslHmacChannelAuthenticatorTest : public testing::Test {
  public:
   SslHmacChannelAuthenticatorTest() {}
-  virtual ~SslHmacChannelAuthenticatorTest() {}
+  ~SslHmacChannelAuthenticatorTest() override {}
 
  protected:
-  virtual void SetUp() override {
+  void SetUp() override {
     base::FilePath certs_dir(net::GetTestCertsDirectory());
 
     base::FilePath cert_path = certs_dir.AppendASCII("unittest.selfsigned.der");