Standardize usage of virtual/override/final in mojo/

mojo/services/surfaces/surfaces_service_application.h

Index: mojo/services/surfaces/surfaces_service_application.h
diff --git a/mojo/services/surfaces/surfaces_service_application.h b/mojo/services/surfaces/surfaces_service_application.h
index c2fc8db0c9851839d7541f459c36b81aa23aa317..3a6aa1c871e68c5bb59df6c07a1dd07beaceab6b 100644
--- a/mojo/services/surfaces/surfaces_service_application.h
+++ b/mojo/services/surfaces/surfaces_service_application.h
@@ -21,19 +21,18 @@ class SurfacesServiceApplication : public ApplicationDelegate,
                                    public SurfacesImpl::Client {
  public:
   SurfacesServiceApplication();
-  virtual ~SurfacesServiceApplication();
+  ~SurfacesServiceApplication() override;
 
   // ApplicationDelegate implementation.
-  virtual bool ConfigureIncomingConnection(
-      ApplicationConnection* connection) override;
+  bool ConfigureIncomingConnection(ApplicationConnection* connection) override;
 
   // InterfaceFactory<SurfacsServicee> implementation.
-  virtual void Create(ApplicationConnection* connection,
-                      InterfaceRequest<SurfacesService> request) override;
+  void Create(ApplicationConnection* connection,
+              InterfaceRequest<SurfacesService> request) override;
 
   // SurfacesImpl::Client implementation.
-  virtual void FrameSubmitted() override;
-  virtual void SetDisplay(cc::Display*) override;
+  void FrameSubmitted() override;
+  void SetDisplay(cc::Display*) override;
 
  private:
   cc::SurfaceManager manager_;