Standardize usage of virtual/override/final specifiers.

components/search_engines/default_search_manager_unittest.cc

Index: components/search_engines/default_search_manager_unittest.cc
diff --git a/components/search_engines/default_search_manager_unittest.cc b/components/search_engines/default_search_manager_unittest.cc
index 9c9bb917e632fab914575cd55631fd0b4529a416..a6718d63ed8bd8ff3a6a92747c5070139eb4355f 100644
--- a/components/search_engines/default_search_manager_unittest.cc
+++ b/components/search_engines/default_search_manager_unittest.cc
@@ -141,7 +141,7 @@ class DefaultSearchManagerTest : public testing::Test {
  public:
   DefaultSearchManagerTest() {};
 
-  virtual void SetUp() override {
+  void SetUp() override {
     pref_service_.reset(new user_prefs::TestingPrefServiceSyncable);
     DefaultSearchManager::RegisterProfilePrefs(pref_service_->registry());
     TemplateURLPrepopulateData::RegisterProfilePrefs(pref_service_->registry());