Standardize usage of virtual/override/final in ui/

ui/base/ime/input_method_base.h

Index: ui/base/ime/input_method_base.h
diff --git a/ui/base/ime/input_method_base.h b/ui/base/ime/input_method_base.h
index 76260e699844c0e0899bf9d7e28a08a85ce02815..8c6dd258d76ae094ed22ea2f1ee0847ab594aaa5 100644
--- a/ui/base/ime/input_method_base.h
+++ b/ui/base/ime/input_method_base.h
@@ -29,31 +29,31 @@ class UI_BASE_EXPORT InputMethodBase
      public base::SupportsWeakPtr<InputMethodBase> {
  public:
   InputMethodBase();
-  virtual ~InputMethodBase();
+  ~InputMethodBase() override;
 
   // Overriden from InputMethod.
-  virtual void SetDelegate(internal::InputMethodDelegate* delegate) override;
-  virtual void Init(bool focused) override;
+  void SetDelegate(internal::InputMethodDelegate* delegate) override;
+  void Init(bool focused) override;
   // If a derived class overrides OnFocus()/OnBlur(), it should call parent's
   // implementation first, to make sure |system_toplevel_window_focused_| flag
   // can be updated correctly.
-  virtual void OnFocus() override;
-  virtual void OnBlur() override;
-  virtual void SetFocusedTextInputClient(TextInputClient* client) override;
-  virtual void DetachTextInputClient(TextInputClient* client) override;
-  virtual TextInputClient* GetTextInputClient() const override;
+  void OnFocus() override;
+  void OnBlur() override;
+  void SetFocusedTextInputClient(TextInputClient* client) override;
+  void DetachTextInputClient(TextInputClient* client) override;
+  TextInputClient* GetTextInputClient() const override;
 
   // If a derived class overrides this method, it should call parent's
   // implementation.
-  virtual void OnTextInputTypeChanged(const TextInputClient* client) override;
+  void OnTextInputTypeChanged(const TextInputClient* client) override;
 
-  virtual TextInputType GetTextInputType() const override;
-  virtual TextInputMode GetTextInputMode() const override;
-  virtual bool CanComposeInline() const override;
-  virtual void ShowImeIfNeeded() override;
+  TextInputType GetTextInputType() const override;
+  TextInputMode GetTextInputMode() const override;
+  bool CanComposeInline() const override;
+  void ShowImeIfNeeded() override;
 
-  virtual void AddObserver(InputMethodObserver* observer) override;
-  virtual void RemoveObserver(InputMethodObserver* observer) override;
+  void AddObserver(InputMethodObserver* observer) override;
+  void RemoveObserver(InputMethodObserver* observer) override;
 
  protected:
   virtual void OnWillChangeFocusedClient(TextInputClient* focused_before,