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

chrome/browser/extensions/test_extension_prefs.cc

 // 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.
 
 #include "chrome/browser/extensions/test_extension_prefs.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/files/file_util.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 26 matching lines @@
 
 namespace {
 
 // A TimeProvider which returns an incrementally later time each time
 // GetCurrentTime is called.
 class IncrementalTimeProvider : public ExtensionPrefs::TimeProvider {
  public:
   IncrementalTimeProvider() : current_time_(base::Time::Now()) {
   }
 
-  virtual ~IncrementalTimeProvider() {
-  }
+  ~IncrementalTimeProvider() override {}
 
-  virtual base::Time GetCurrentTime() const override {
+  base::Time GetCurrentTime() const override {
     current_time_ += base::TimeDelta::FromSeconds(10);
     return current_time_;
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(IncrementalTimeProvider);
 
   mutable base::Time current_time_;
 };
 
@@ skipping 119 matching lines @@
 PrefService* TestExtensionPrefs::CreateIncognitoPrefService() const {
   return pref_service_->CreateIncognitoPrefService(
       new ExtensionPrefStore(extension_pref_value_map_.get(), true));
 }
 
 void TestExtensionPrefs::set_extensions_disabled(bool extensions_disabled) {
   extensions_disabled_ = extensions_disabled;
 }
 
 }  // namespace extensions