Standardize usage of virtual/override/final specifiers.

ui/app_list/views/pulsing_block_view.h

Index: ui/app_list/views/pulsing_block_view.h
diff --git a/ui/app_list/views/pulsing_block_view.h b/ui/app_list/views/pulsing_block_view.h
index f517bc0bb14b95da064603346c408ad5a5e4da8a..160ee0ccb36eb82ea29febd6a0e47141d480b4ec 100644
--- a/ui/app_list/views/pulsing_block_view.h
+++ b/ui/app_list/views/pulsing_block_view.h
@@ -22,13 +22,13 @@ class PulsingBlockView : public views::View {
   // Constructs a PulsingBlockView of |size|. If |start_delay| is true,
   // starts the pulsing animation after a random delay.
   PulsingBlockView(const gfx::Size& size, bool start_delay);
-  virtual ~PulsingBlockView();
+  ~PulsingBlockView() override;
 
  private:
   void OnStartDelayTimer();
 
   // views::View overrides:
-  virtual void OnPaint(gfx::Canvas* canvas) override;
+  void OnPaint(gfx::Canvas* canvas) override;
 
   base::OneShotTimer<PulsingBlockView> start_delay_timer_;