Standardize usage of virtual/override/final specifiers.

remoting/host/host_status_sender_unittest.cc

Index: remoting/host/host_status_sender_unittest.cc
diff --git a/remoting/host/host_status_sender_unittest.cc b/remoting/host/host_status_sender_unittest.cc
index fe844010b6733874aff6434b18c2bfc543377644..abb66e74e3cb12ef2df6c6ed6d5d8d543f8967aa 100644
--- a/remoting/host/host_status_sender_unittest.cc
+++ b/remoting/host/host_status_sender_unittest.cc
@@ -41,7 +41,7 @@ const char kTestExitCodeString[] = "INVALID_HOST_CONFIGURATION";
 class HostStatusSenderTest
     : public testing::Test {
  protected:
-  virtual void SetUp() override {
+  void SetUp() override {
     key_pair_ = RsaKeyPair::FromString(kTestRsaKeyPair);
     ASSERT_TRUE(key_pair_.get());
 
@@ -49,9 +49,7 @@ class HostStatusSenderTest
         kHostId, &signal_strategy_, key_pair_, kTestBotJid));
   }
 
-  virtual void TearDown() override {
-    host_status_sender_.reset();
-  }
+  void TearDown() override { host_status_sender_.reset(); }
 
   void ValidateHostStatusStanza(XmlElement* stanza,
                                 HostStatusSender::HostStatus status);