Standardize usage of virtual/override/final in components/

components/content_settings/core/browser/content_settings_rule.h

 // Copyright (c) 2011 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.
 
 // Interface for objects providing content setting rules.
 
 #ifndef COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_CONTENT_SETTINGS_RULE_H_
 #define COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_CONTENT_SETTINGS_RULE_H_
 
 #include "base/compiler_specific.h"
@@ skipping 21 matching lines @@
 
 class RuleIterator {
  public:
   virtual ~RuleIterator();
   virtual bool HasNext() const = 0;
   virtual Rule Next() = 0;
 };
 
 class EmptyRuleIterator : public RuleIterator {
  public:
-  virtual ~EmptyRuleIterator();
-  virtual bool HasNext() const override;
-  virtual Rule Next() override;
+  ~EmptyRuleIterator() override;
+  bool HasNext() const override;
+  Rule Next() override;
 };
 
 class ConcatenationIterator : public RuleIterator {
  public:
   // ConcatenationIterator takes ownership of the pointers in the |iterators|
   // list and |auto_lock|. |auto_lock| can be NULL if no locking is needed.
   ConcatenationIterator(ScopedVector<RuleIterator>* iterators,
                         base::AutoLock* auto_lock);
-  virtual ~ConcatenationIterator();
-  virtual bool HasNext() const override;
-  virtual Rule Next() override;
+  ~ConcatenationIterator() override;
+  bool HasNext() const override;
+  Rule Next() override;
+
  private:
   ScopedVector<RuleIterator> iterators_;
   scoped_ptr<base::AutoLock> auto_lock_;
 };
 
 }  // namespace content_settings
 
 #endif  // COMPONENTS_CONTENT_SETTINGS_CORE_BROWSER_CONTENT_SETTINGS_RULE_H_