Standardize usage of virtual/override/final in content/

content/test/appcache_test_helper.h

 // Copyright 2014 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 CONTENT_TEST_APPCACHE_TEST_HELPER_H_
 #define CONTENT_TEST_APPCACHE_TEST_HELPER_H_
 
 #include <set>
 
 #include "content/browser/appcache/appcache_storage.h"
 
 namespace content {
 class AppCacheServiceImpl;
 }
 
 namespace content {
 
 // Helper class for inserting data into a ChromeAppCacheService and reading it
 // back.
 class AppCacheTestHelper : public AppCacheStorage::Delegate {
  public:
   AppCacheTestHelper();
-  virtual ~AppCacheTestHelper();
+  ~AppCacheTestHelper() override;
   void AddGroupAndCache(AppCacheServiceImpl* appcache_service,
                         const GURL& manifest_url);
 
   void GetOriginsWithCaches(AppCacheServiceImpl* appcache_service,
                             std::set<GURL>* origins);
  private:
-  virtual void OnGroupAndNewestCacheStored(
-      AppCacheGroup* group,
-      AppCache* newest_cache,
-      bool success,
-      bool would_exceed_quota) override;
+  void OnGroupAndNewestCacheStored(AppCacheGroup* group,
+                                   AppCache* newest_cache,
+                                   bool success,
+                                   bool would_exceed_quota) override;
   void OnGotAppCacheInfo(int rv);
 
   int group_id_;
   int appcache_id_;
   int response_id_;
   scoped_refptr<AppCacheInfoCollection> appcache_info_;
   std::set<GURL>* origins_;  // not owned
 
   DISALLOW_COPY_AND_ASSIGN(AppCacheTestHelper);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_TEST_APPCACHE_TEST_HELPER_H_