Standardize usage of virtual/override/final in content/browser/

content/browser/indexed_db/leveldb/leveldb_iterator_impl.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_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_ITERATOR_IMPL_H_
 #define CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_ITERATOR_IMPL_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "content/browser/indexed_db/leveldb/leveldb_iterator.h"
 #include "content/common/content_export.h"
 #include "third_party/leveldatabase/src/include/leveldb/iterator.h"
 
 namespace content {
 
 class CONTENT_EXPORT LevelDBIteratorImpl : public content::LevelDBIterator {
  public:
-  virtual ~LevelDBIteratorImpl();
-  virtual bool IsValid() const override;
-  virtual leveldb::Status SeekToLast() override;
-  virtual leveldb::Status Seek(const base::StringPiece& target) override;
-  virtual leveldb::Status Next() override;
-  virtual leveldb::Status Prev() override;
-  virtual base::StringPiece Key() const override;
-  virtual base::StringPiece Value() const override;
+  ~LevelDBIteratorImpl() override;
+  bool IsValid() const override;
+  leveldb::Status SeekToLast() override;
+  leveldb::Status Seek(const base::StringPiece& target) override;
+  leveldb::Status Next() override;
+  leveldb::Status Prev() override;
+  base::StringPiece Key() const override;
+  base::StringPiece Value() const override;
 
  protected:
   explicit LevelDBIteratorImpl(scoped_ptr<leveldb::Iterator> iterator);
 
  private:
   void CheckStatus();
 
   friend class IndexedDBClassFactory;
   friend class MockBrowserTestIndexedDBClassFactory;
 
   scoped_ptr<leveldb::Iterator> iterator_;
 
   DISALLOW_COPY_AND_ASSIGN(LevelDBIteratorImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_ITERATOR_IMPL_H_