Standardize usage of virtual/override/final in ui/

ui/base/resource/resource_bundle.cc

Index: ui/base/resource/resource_bundle.cc
diff --git a/ui/base/resource/resource_bundle.cc b/ui/base/resource/resource_bundle.cc
index 9f693b8a5d8b12299e1e723aa18405a84c1b3207..c4d70b29841aafe3e788bd266d948da96cf61533 100644
--- a/ui/base/resource/resource_bundle.cc
+++ b/ui/base/resource/resource_bundle.cc
@@ -124,10 +124,10 @@ class ResourceBundle::ResourceBundleImageSource : public gfx::ImageSkiaSource {
  public:
   ResourceBundleImageSource(ResourceBundle* rb, int resource_id)
       : rb_(rb), resource_id_(resource_id) {}
-  virtual ~ResourceBundleImageSource() {}
+  ~ResourceBundleImageSource() override {}
 
   // gfx::ImageSkiaSource overrides:
-  virtual gfx::ImageSkiaRep GetImageForScale(float scale) override {
+  gfx::ImageSkiaRep GetImageForScale(float scale) override {
     SkBitmap image;
     bool fell_back_to_1x = false;
     ScaleFactor scale_factor = GetSupportedScaleFactor(scale);