Standardize usage of virtual/override/final in chrome/browser/ui/

chrome/browser/ui/cocoa/color_chooser_mac.mm

Index: chrome/browser/ui/cocoa/color_chooser_mac.mm
diff --git a/chrome/browser/ui/cocoa/color_chooser_mac.mm b/chrome/browser/ui/cocoa/color_chooser_mac.mm
index 4d40d0ed5cb88633eee2a8c5e5ed22b6009a1298..bc9166c0a279aa6c93dd6dfbe0534e99778c6f42 100644
--- a/chrome/browser/ui/cocoa/color_chooser_mac.mm
+++ b/chrome/browser/ui/cocoa/color_chooser_mac.mm
@@ -39,14 +39,14 @@ class ColorChooserMac : public content::ColorChooser {
                                SkColor initial_color);
 
   ColorChooserMac(content::WebContents* tab, SkColor initial_color);
-  virtual ~ColorChooserMac();
+  ~ColorChooserMac() override;
 
   // Called from ColorPanelCocoa.
   void DidChooseColorInColorPanel(SkColor color);
   void DidCloseColorPabel();
 
-  virtual void End() override;
-  virtual void SetSelectedColor(SkColor color) override;
+  void End() override;
+  void SetSelectedColor(SkColor color) override;
 
  private:
   static ColorChooserMac* current_color_chooser_;