Standardize usage of virtual/override/final specifiers.

ui/views/accessible_pane_view_unittest.cc

Index: ui/views/accessible_pane_view_unittest.cc
diff --git a/ui/views/accessible_pane_view_unittest.cc b/ui/views/accessible_pane_view_unittest.cc
index 126fc9164355d02293026256346dd30e40bb4939..d53fb72f67db1d0e3513b3b11a5633e2f249bce5 100644
--- a/ui/views/accessible_pane_view_unittest.cc
+++ b/ui/views/accessible_pane_view_unittest.cc
@@ -21,10 +21,9 @@ class TestBarView : public AccessiblePaneView,
                     public ButtonListener {
  public:
   TestBarView();
-  virtual ~TestBarView();
+  ~TestBarView() override;
 
-  virtual void ButtonPressed(Button* sender,
-                             const ui::Event& event) override;
+  void ButtonPressed(Button* sender, const ui::Event& event) override;
   LabelButton* child_button() const { return child_button_.get(); }
   LabelButton* second_child_button() const {
     return second_child_button_.get();
@@ -32,7 +31,7 @@ class TestBarView : public AccessiblePaneView,
   LabelButton* third_child_button() const { return third_child_button_.get(); }
   LabelButton* not_child_button() const { return not_child_button_.get(); }
 
-  virtual View* GetDefaultFocusableChild() override;
+  View* GetDefaultFocusableChild() override;
 
  private:
   void Init();