Standardize usage of virtual/override/final in mojo/

mojo/services/test_service/test_request_tracker_application.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MOJO_SERVICES_TEST_SERVICE_TEST_REQUEST_TRACKER_APPLICATION_H_
 #define MOJO_SERVICES_TEST_SERVICE_TEST_REQUEST_TRACKER_APPLICATION_H_
 
 #include "mojo/public/cpp/application/application_delegate.h"
 #include "mojo/public/cpp/application/interface_factory_impl.h"
 #include "mojo/public/cpp/system/macros.h"
 #include "mojo/services/test_service/test_request_tracker_impl.h"
 
 namespace mojo {
 namespace test {
 class TestTimeService;
 
 // Embeds TestRequestTracker mojo services into an application.
 class TestRequestTrackerApplication : public ApplicationDelegate,
                                       public InterfaceFactory<TestTimeService> {
  public:
   TestRequestTrackerApplication();
-  virtual ~TestRequestTrackerApplication();
+  ~TestRequestTrackerApplication() override;
 
   // ApplicationDelegate methods:
-  virtual bool ConfigureIncomingConnection(
-      ApplicationConnection* connection) override;
+  bool ConfigureIncomingConnection(ApplicationConnection* connection) override;
 
   // InterfaceFactory<TestTimeService> methods:
-  virtual void Create(ApplicationConnection* connection,
-                      InterfaceRequest<TestTimeService> request) override;
+  void Create(ApplicationConnection* connection,
+              InterfaceRequest<TestTimeService> request) override;
 
  private:
   TrackingContext context_;
   typedef InterfaceFactoryImplWithContext<TestTrackedRequestServiceImpl,
                                           TrackingContext>
       TestTrackedRequestFactory;
   TestTrackedRequestFactory test_tracked_request_factory_;
   typedef InterfaceFactoryImplWithContext<TestRequestTrackerImpl,
                                           TrackingContext>
       TestRequestTrackerFactory;
   TestRequestTrackerFactory test_request_tracker_factory_;
   MOJO_DISALLOW_COPY_AND_ASSIGN(TestRequestTrackerApplication);
 };
 
 }  // namespace test
 }  // namespace mojo
 
 #endif  // MOJO_SERVICES_TEST_SERVICE_TEST_REQUEST_TRACKER_APPLICATION_H_