Standardize usage of virtual/override/final in base/

base/prefs/testing_pref_service.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_PREFS_TESTING_PREF_SERVICE_H_
 #define BASE_PREFS_TESTING_PREF_SERVICE_H_
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_registry.h"
@@ skipping 66 matching lines @@
   scoped_refptr<TestingPrefStore> recommended_prefs_;
 
   DISALLOW_COPY_AND_ASSIGN(TestingPrefServiceBase);
 };
 
 // Test version of PrefService.
 class TestingPrefServiceSimple
     : public TestingPrefServiceBase<PrefService, PrefRegistry> {
  public:
   TestingPrefServiceSimple();
-  virtual ~TestingPrefServiceSimple();
+  ~TestingPrefServiceSimple() override;
 
   // This is provided as a convenience for registering preferences on
   // an existing TestingPrefServiceSimple instance. On a production
   // PrefService you would do all registrations before constructing
   // it, passing it a PrefRegistry via its constructor (or via
   // e.g. PrefServiceFactory).
   PrefRegistrySimple* registry();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TestingPrefServiceSimple);
@@ skipping 91 matching lines @@
 }
 
 template<class SuperPrefService, class ConstructionPrefRegistry>
 void TestingPrefServiceBase<
     SuperPrefService, ConstructionPrefRegistry>::RemovePref(
         TestingPrefStore* pref_store, const char* path) {
   pref_store->RemoveValue(path);
 }
 
 #endif  // BASE_PREFS_TESTING_PREF_SERVICE_H_