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

chrome/browser/ui/app_list/extension_app_item.cc

Index: chrome/browser/ui/app_list/extension_app_item.cc
diff --git a/chrome/browser/ui/app_list/extension_app_item.cc b/chrome/browser/ui/app_list/extension_app_item.cc
index 39f24e8cb1519e36e31d44cf7db0bcc103eef7f7..595ea14dcb40368471f668e267a74a4eda3472aa 100644
--- a/chrome/browser/ui/app_list/extension_app_item.cc
+++ b/chrome/browser/ui/app_list/extension_app_item.cc
@@ -44,11 +44,11 @@ class ShortcutOverlayImageSource : public gfx::CanvasImageSource {
       : gfx::CanvasImageSource(icon.size(), false),
         icon_(icon) {
   }
-  virtual ~ShortcutOverlayImageSource() {}
+  ~ShortcutOverlayImageSource() override {}
 
  private:
   // gfx::CanvasImageSource overrides:
-  virtual void Draw(gfx::Canvas* canvas) override {
+  void Draw(gfx::Canvas* canvas) override {
     canvas->DrawImageInt(icon_, 0, 0);
 
     // Draw the overlay in the bottom left corner of the icon.
@@ -69,11 +69,11 @@ class RoundedCornersImageSource : public gfx::CanvasImageSource {
       : gfx::CanvasImageSource(icon.size(), false),
         icon_(icon) {
   }
-  virtual ~RoundedCornersImageSource() {}
+  ~RoundedCornersImageSource() override {}
 
  private:
   // gfx::CanvasImageSource overrides:
-  virtual void Draw(gfx::Canvas* canvas) override {
+  void Draw(gfx::Canvas* canvas) override {
     // The radius used to round the app icon.
     const size_t kRoundingRadius = 2;