Standardize usage of virtual/override/final in components/

components/search_provider_logos/logo_tracker_unittest.cc

Index: components/search_provider_logos/logo_tracker_unittest.cc
diff --git a/components/search_provider_logos/logo_tracker_unittest.cc b/components/search_provider_logos/logo_tracker_unittest.cc
index 27d6951795494aea250125144fd0544066421261..c5c1f35a9208fd6ac8c62b859263ec67ea42befa 100644
--- a/components/search_provider_logos/logo_tracker_unittest.cc
+++ b/components/search_provider_logos/logo_tracker_unittest.cc
@@ -277,9 +277,9 @@ class MockLogoObserver : public LogoObserver {
 class TestLogoDelegate : public LogoDelegate {
  public:
   TestLogoDelegate() {}
-  virtual ~TestLogoDelegate() {}
+  ~TestLogoDelegate() override {}
 
-  virtual void DecodeUntrustedImage(
+  void DecodeUntrustedImage(
       const scoped_refptr<base::RefCountedString>& encoded_image,
       base::Callback<void(const SkBitmap&)> image_decoded_callback) override {
     SkBitmap bitmap =