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

chrome/browser/profiles/profile_avatar_icon_util.cc

Index: chrome/browser/profiles/profile_avatar_icon_util.cc
diff --git a/chrome/browser/profiles/profile_avatar_icon_util.cc b/chrome/browser/profiles/profile_avatar_icon_util.cc
index d413cf6b008bf95fa9f4c33269a5c5f6e4a1e58e..9d79491ce3d9ab6f798467e63bbfd5e788edd16a 100644
--- a/chrome/browser/profiles/profile_avatar_icon_util.cc
+++ b/chrome/browser/profiles/profile_avatar_icon_util.cc
@@ -57,10 +57,10 @@ class AvatarImageSource : public gfx::CanvasImageSource {
                     int width,
                     AvatarPosition position,
                     AvatarBorder border);
-  virtual ~AvatarImageSource();
+  ~AvatarImageSource() override;
 
   // CanvasImageSource override:
-  virtual void Draw(gfx::Canvas* canvas) override;
+  void Draw(gfx::Canvas* canvas) override;
 
  private:
   gfx::ImageSkia avatar_;