Update {virtual,override} to follow C++11 style in components.

components/leveldb_proto/testing/fake_db.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 COMPONENTS_LEVELDB_PROTO_TESTING_FAKE_DB_H_
 #define COMPONENTS_LEVELDB_PROTO_TESTING_FAKE_DB_H_
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "components/leveldb_proto/proto_database.h"
 
 namespace leveldb_proto {
 namespace test {
 
 template <typename T>
 class FakeDB : public ProtoDatabase<T> {
   typedef base::Callback<void(bool)> Callback;
 
  public:
   typedef typename base::hash_map<std::string, T> EntryMap;
 
   explicit FakeDB(EntryMap* db);
-  virtual ~FakeDB();
+  ~FakeDB() override;
 
-  virtual void Init(const base::FilePath& database_dir,
-                    typename ProtoDatabase<T>::InitCallback callback)
-      override;
+  void Init(const base::FilePath& database_dir,
+            typename ProtoDatabase<T>::InitCallback callback) override;
 
-  virtual void UpdateEntries(
+  void UpdateEntries(
       scoped_ptr<typename ProtoDatabase<T>::KeyEntryVector> entries_to_save,
       scoped_ptr<std::vector<std::string> > keys_to_remove,
       typename ProtoDatabase<T>::UpdateCallback callback) override;
 
-  virtual void LoadEntries(typename ProtoDatabase<T>::LoadCallback callback)
-      override;
+  void LoadEntries(typename ProtoDatabase<T>::LoadCallback callback) override;
   base::FilePath& GetDirectory();
 
   void InitCallback(bool success);
 
   void LoadCallback(bool success);
 
   void UpdateCallback(bool success);
 
   static base::FilePath DirectoryForTestDB();
 
@@ skipping 86 matching lines @@
 // static
 template <typename T>
 base::FilePath FakeDB<T>::DirectoryForTestDB() {
   return base::FilePath(FILE_PATH_LITERAL("/fake/path"));
 }
 
 }  // namespace test
 }  // namespace leveldb_proto
 
 #endif  // COMPONENTS_LEVELDB_PROTO_TESTING_FAKE_DB_H_