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

chrome/browser/extensions/activity_log/activity_database_unittest.cc

Index: chrome/browser/extensions/activity_log/activity_database_unittest.cc
diff --git a/chrome/browser/extensions/activity_log/activity_database_unittest.cc b/chrome/browser/extensions/activity_log/activity_database_unittest.cc
index b65322767cdb7fdd38906ba6fc689f038b03f2d3..dab330a798bf23d17b92aa2a4b6da422c7dc6f50 100644
--- a/chrome/browser/extensions/activity_log/activity_database_unittest.cc
+++ b/chrome/browser/extensions/activity_log/activity_database_unittest.cc
@@ -53,10 +53,10 @@ class ActivityDatabaseTestPolicy : public ActivityDatabase::Delegate {
   virtual void Record(ActivityDatabase* db, scoped_refptr<Action> action);
 
  protected:
-  virtual bool InitDatabase(sql::Connection* db) override;
-  virtual bool FlushDatabase(sql::Connection*) override;
-  virtual void OnDatabaseFailure() override {}
-  virtual void OnDatabaseClose() override { delete this; }
+  bool InitDatabase(sql::Connection* db) override;
+  bool FlushDatabase(sql::Connection*) override;
+  void OnDatabaseFailure() override {}
+  void OnDatabaseClose() override { delete this; }
 
   std::vector<scoped_refptr<Action> > queue_;
 };