Standardize usage of virtual/override/final specifiers.

ui/views/examples/multiline_example.h

Index: ui/views/examples/multiline_example.h
diff --git a/ui/views/examples/multiline_example.h b/ui/views/examples/multiline_example.h
index 8b0888c58497cd9a061f9fc7721c8fcff2a72c58..a4c3ba56ea0d3de17867b20677d2cc3eb56e0307 100644
--- a/ui/views/examples/multiline_example.h
+++ b/ui/views/examples/multiline_example.h
@@ -23,20 +23,20 @@ class VIEWS_EXAMPLES_EXPORT MultilineExample : public ExampleBase,
                                                public ButtonListener {
  public:
   MultilineExample();
-  virtual ~MultilineExample();
+  ~MultilineExample() override;
 
   // ExampleBase:
-  virtual void CreateExampleView(View* container) override;
+  void CreateExampleView(View* container) override;
 
   // ButtonListener:
-  virtual void ButtonPressed(Button* sender, const ui::Event& event) override;
+  void ButtonPressed(Button* sender, const ui::Event& event) override;
 
  private:
   class RenderTextView;
 
   // TextfieldController:
-  virtual void ContentsChanged(Textfield* sender,
-                               const base::string16& new_contents) override;
+  void ContentsChanged(Textfield* sender,
+                       const base::string16& new_contents) override;
 
   RenderTextView* render_text_view_;
   Label* label_;