Standardize usage of virtual/override/final in remoting/

remoting/client/plugin/normalizing_input_filter_mac.h

Index: remoting/client/plugin/normalizing_input_filter_mac.h
diff --git a/remoting/client/plugin/normalizing_input_filter_mac.h b/remoting/client/plugin/normalizing_input_filter_mac.h
index 5e339119fc334aeca55feee97e1d9c1253b36f87..a262cda8b64e3f738bf03c11cd98357410f30e65 100644
--- a/remoting/client/plugin/normalizing_input_filter_mac.h
+++ b/remoting/client/plugin/normalizing_input_filter_mac.h
@@ -45,10 +45,10 @@ namespace remoting {
 class NormalizingInputFilterMac : public protocol::InputFilter {
  public:
   explicit NormalizingInputFilterMac(protocol::InputStub* input_stub);
-  virtual ~NormalizingInputFilterMac();
+  ~NormalizingInputFilterMac() override;
 
   // InputFilter overrides.
-  virtual void InjectKeyEvent(const protocol::KeyEvent& event) override;
+  void InjectKeyEvent(const protocol::KeyEvent& event) override;
 
  private:
   typedef std::map<int, protocol::KeyEvent> KeyPressedMap;