Standardize usage of virtual/override/final in remoting/

remoting/host/input_injector_mac.cc

Index: remoting/host/input_injector_mac.cc
diff --git a/remoting/host/input_injector_mac.cc b/remoting/host/input_injector_mac.cc
index 683fa0bc323785484baf005cc45dd1a031a2579f..b51b6152235cfb7553d651faa449ccb2e6294d37 100644
--- a/remoting/host/input_injector_mac.cc
+++ b/remoting/host/input_injector_mac.cc
@@ -60,19 +60,18 @@ class InputInjectorMac : public InputInjector {
  public:
   explicit InputInjectorMac(
       scoped_refptr<base::SingleThreadTaskRunner> task_runner);
-  virtual ~InputInjectorMac();
+  ~InputInjectorMac() override;
 
   // ClipboardStub interface.
-  virtual void InjectClipboardEvent(const ClipboardEvent& event) override;
+  void InjectClipboardEvent(const ClipboardEvent& event) override;
 
   // InputStub interface.
-  virtual void InjectKeyEvent(const KeyEvent& event) override;
-  virtual void InjectTextEvent(const TextEvent& event) override;
-  virtual void InjectMouseEvent(const MouseEvent& event) override;
+  void InjectKeyEvent(const KeyEvent& event) override;
+  void InjectTextEvent(const TextEvent& event) override;
+  void InjectMouseEvent(const MouseEvent& event) override;
 
   // InputInjector interface.
-  virtual void Start(
-      scoped_ptr<protocol::ClipboardStub> client_clipboard) override;
+  void Start(scoped_ptr<protocol::ClipboardStub> client_clipboard) override;
 
  private:
   // The actual implementation resides in InputInjectorMac::Core class.