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

content/browser/indexed_db/leveldb/leveldb_iterator_impl.h

Index: content/browser/indexed_db/leveldb/leveldb_iterator_impl.h
diff --git a/content/browser/indexed_db/leveldb/leveldb_iterator_impl.h b/content/browser/indexed_db/leveldb/leveldb_iterator_impl.h
index be0532781538444a43d1ec6507b7ce4b0b576cd5..72b92e0f93b15889ad40e71d18e9a30a0bdd50e5 100644
--- a/content/browser/indexed_db/leveldb/leveldb_iterator_impl.h
+++ b/content/browser/indexed_db/leveldb/leveldb_iterator_impl.h
@@ -14,14 +14,14 @@ 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);