Standardize usage of virtual/override/final specifiers.

chrome/browser/prefs/profile_pref_store_manager_unittest.cc

Index: chrome/browser/prefs/profile_pref_store_manager_unittest.cc
diff --git a/chrome/browser/prefs/profile_pref_store_manager_unittest.cc b/chrome/browser/prefs/profile_pref_store_manager_unittest.cc
index bc9d9831314b04e6a987fa15d4d91f2bb8c5e00d..03f47aee6339aba30ed9f9773da32c25bdee1b8e 100644
--- a/chrome/browser/prefs/profile_pref_store_manager_unittest.cc
+++ b/chrome/browser/prefs/profile_pref_store_manager_unittest.cc
@@ -95,7 +95,7 @@ class ProfilePrefStoreManagerTest : public testing::Test {
         seed_("seed"),
         reset_recorded_(false) {}
 
-  virtual void SetUp() override {
+  void SetUp() override {
     ProfilePrefStoreManager::RegisterPrefs(local_state_.registry());
     ProfilePrefStoreManager::RegisterProfilePrefs(profile_pref_registry_.get());
     for (const PrefHashFilter::TrackedPreferenceMetadata* it = kConfiguration;
@@ -140,7 +140,7 @@ class ProfilePrefStoreManagerTest : public testing::Test {
                                                &local_state_));
   }
 
-  virtual void TearDown() override { DestroyPrefStore(); }
+  void TearDown() override { DestroyPrefStore(); }
 
  protected:
   // Verifies whether a reset was reported via the RecordReset() hook. Also