Standardize usage of virtual/override/final in remoting/

remoting/host/fake_mouse_cursor_monitor.h

Index: remoting/host/fake_mouse_cursor_monitor.h
diff --git a/remoting/host/fake_mouse_cursor_monitor.h b/remoting/host/fake_mouse_cursor_monitor.h
index ebb20c597996e0dc303ad066160f0ca366912c04..c53a355d991051b21d353bb700948c5571c68128 100644
--- a/remoting/host/fake_mouse_cursor_monitor.h
+++ b/remoting/host/fake_mouse_cursor_monitor.h
@@ -12,10 +12,10 @@ namespace remoting {
 class FakeMouseCursorMonitor : public webrtc::MouseCursorMonitor {
  public:
   FakeMouseCursorMonitor();
-  virtual ~FakeMouseCursorMonitor();
+  ~FakeMouseCursorMonitor() override;
 
-  virtual void Init(Callback* callback, Mode mode) override;
-  virtual void Capture() override;
+  void Init(Callback* callback, Mode mode) override;
+  void Capture() override;
 
  private:
   Callback* callback_;