Standardize usage of virtual/override/final in mojo/

mojo/services/public/cpp/view_manager/view_manager_client_factory.h

Index: mojo/services/public/cpp/view_manager/view_manager_client_factory.h
diff --git a/mojo/services/public/cpp/view_manager/view_manager_client_factory.h b/mojo/services/public/cpp/view_manager/view_manager_client_factory.h
index d2ed548da03f1a91171127a17ef955af6c1fb865..c82890093ce295b26876afb59f21859461120be0 100644
--- a/mojo/services/public/cpp/view_manager/view_manager_client_factory.h
+++ b/mojo/services/public/cpp/view_manager/view_manager_client_factory.h
@@ -19,11 +19,11 @@ class Shell;
 class ViewManagerClientFactory : public InterfaceFactory<ViewManagerClient> {
  public:
   ViewManagerClientFactory(Shell* shell, ViewManagerDelegate* delegate);
-  virtual ~ViewManagerClientFactory();
+  ~ViewManagerClientFactory() override;
 
   // InterfaceFactory<ViewManagerClient> implementation.
-  virtual void Create(ApplicationConnection* connection,
-                      InterfaceRequest<ViewManagerClient> request) override;
+  void Create(ApplicationConnection* connection,
+              InterfaceRequest<ViewManagerClient> request) override;
 
  private:
   Shell* shell_;