Standardize usage of virtual/override/final specifiers.

chrome/utility/extensions/unpacker_unittest.cc

 // Copyright (c) 2012 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_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/path_service.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/utility/extensions/unpacker.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/manifest_constants.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 using base::ASCIIToUTF16;
 
 namespace extensions {
 
 namespace errors = manifest_errors;
 namespace keys = manifest_keys;
 
 class UnpackerTest : public testing::Test {
  public:
-  virtual ~UnpackerTest() {
+  ~UnpackerTest() override {
     LOG(WARNING) << "Deleting temp dir: "
                  << temp_dir_.path().LossyDisplayName();
     LOG(WARNING) << temp_dir_.Delete();
   }
 
   void SetupUnpacker(const std::string& crx_name) {
     base::FilePath original_path;
     ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &original_path));
     original_path = original_path.AppendASCII("extensions")
         .AppendASCII("unpacker")
@@ skipping 130 matching lines @@
   SetupUnpacker("bad_image.crx");
   EXPECT_FALSE(unpacker_->Run());
   EXPECT_TRUE(StartsWith(unpacker_->error_message(),
               ASCIIToUTF16(kExpected),
               false)) << "Expected prefix: \"" << kExpected
                       << "\", actual error: \"" << unpacker_->error_message()
                       << "\"";
 }
 
 }  // namespace extensions