Standardize usage of virtual/override/final specifiers.

components/visitedlink/test/visitedlink_perftest.cc

Index: components/visitedlink/test/visitedlink_perftest.cc
diff --git a/components/visitedlink/test/visitedlink_perftest.cc b/components/visitedlink/test/visitedlink_perftest.cc
index f3d3dca70d72471a102e5ebb85add513fdbca710..fd598c15d5c33da9c50835214f1d27f680128eec 100644
--- a/components/visitedlink/test/visitedlink_perftest.cc
+++ b/components/visitedlink/test/visitedlink_perftest.cc
@@ -64,12 +64,8 @@ void FillTable(VisitedLinkMaster& master, const char* prefix,
 class VisitedLink : public testing::Test {
  protected:
   base::FilePath db_path_;
-  virtual void SetUp() {
-    ASSERT_TRUE(base::CreateTemporaryFile(&db_path_));
-  }
-  virtual void TearDown() {
-    base::DeleteFile(db_path_, false);
-  }
+  void SetUp() override { ASSERT_TRUE(base::CreateTemporaryFile(&db_path_)); }
+  void TearDown() override { base::DeleteFile(db_path_, false); }
 };
 
 } // namespace