Standardize usage of virtual/override/final in components/

components/bookmarks/browser/bookmark_utils_unittest.cc

Index: components/bookmarks/browser/bookmark_utils_unittest.cc
diff --git a/components/bookmarks/browser/bookmark_utils_unittest.cc b/components/bookmarks/browser/bookmark_utils_unittest.cc
index cc8c9f91a567ab36c29cbece71c96ae073910b9d..8c194bff8bdd406621bb1abd4bdfcb599787a36e 100644
--- a/components/bookmarks/browser/bookmark_utils_unittest.cc
+++ b/components/bookmarks/browser/bookmark_utils_unittest.cc
@@ -54,13 +54,13 @@ class BookmarkUtilsTest : public testing::Test,
 
  private:
   // BaseBookmarkModelObserver:
-  virtual void BookmarkModelChanged() override {}
+  void BookmarkModelChanged() override {}
 
-  virtual void GroupedBookmarkChangesBeginning(BookmarkModel* model) override {
+  void GroupedBookmarkChangesBeginning(BookmarkModel* model) override {
     ++grouped_changes_beginning_count_;
   }
 
-  virtual void GroupedBookmarkChangesEnded(BookmarkModel* model) override {
+  void GroupedBookmarkChangesEnded(BookmarkModel* model) override {
     ++grouped_changes_ended_count_;
   }