Standardize usage of virtual/override/final in net/

net/disk_cache/simple/simple_index_file_unittest.cc

 // 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.
 
 #include "base/files/file.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/hash.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 61 matching lines @@
   using SimpleIndexFile::Deserialize;
   using SimpleIndexFile::LegacyIsIndexFileStale;
   using SimpleIndexFile::Serialize;
   using SimpleIndexFile::SerializeFinalData;
 
   explicit WrappedSimpleIndexFile(const base::FilePath& index_file_directory)
       : SimpleIndexFile(base::ThreadTaskRunnerHandle::Get(),
                         base::ThreadTaskRunnerHandle::Get(),
                         net::DISK_CACHE,
                         index_file_directory) {}
-  virtual ~WrappedSimpleIndexFile() {
-  }
+  ~WrappedSimpleIndexFile() override {}
 
   const base::FilePath& GetIndexFilePath() const {
     return index_file_;
   }
 
   bool CreateIndexFileDirectory() const {
     return base::CreateDirectory(index_file_.DirName());
   }
 };
 
@@ skipping 239 matching lines @@
   WrappedSimpleIndexFile::Deserialize(contents.data(),
                                       contents.size(),
                                       &when_index_last_saw_cache,
                                       &deserialize_result);
   EXPECT_TRUE(deserialize_result.did_load);
 }
 
 #endif  // defined(OS_POSIX)
 
 }  // namespace disk_cache