Standardize usage of virtual/override/final in remoting/

remoting/host/single_window_desktop_environment.cc

Index: remoting/host/single_window_desktop_environment.cc
diff --git a/remoting/host/single_window_desktop_environment.cc b/remoting/host/single_window_desktop_environment.cc
index f764651e25d13b19b6f1bfe31df9302eea145ca5..3b721fce0e3fa83fb43a4b52aff603e3954c5a11 100644
--- a/remoting/host/single_window_desktop_environment.cc
+++ b/remoting/host/single_window_desktop_environment.cc
@@ -16,11 +16,11 @@ namespace remoting {
 class SingleWindowDesktopEnvironment : public BasicDesktopEnvironment {
 
  public:
-  virtual ~SingleWindowDesktopEnvironment();
+  ~SingleWindowDesktopEnvironment() override;
 
   // DesktopEnvironment interface.
-  virtual scoped_ptr<webrtc::DesktopCapturer> CreateVideoCapturer() override;
-  virtual scoped_ptr<InputInjector> CreateInputInjector() override;
+  scoped_ptr<webrtc::DesktopCapturer> CreateVideoCapturer() override;
+  scoped_ptr<InputInjector> CreateInputInjector() override;
 
  protected:
   friend class SingleWindowDesktopEnvironmentFactory;