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

chrome/installer/setup/archive_patch_helper_unittest.cc

 // Copyright 2013 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_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/path_service.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/installer/setup/archive_patch_helper.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 class ArchivePatchHelperTest : public testing::Test {
  protected:
   static void SetUpTestCase() {
     ASSERT_TRUE(PathService::Get(chrome::DIR_TEST_DATA, &data_dir_));
     data_dir_ = data_dir_.AppendASCII("installer");
     ASSERT_TRUE(base::PathExists(data_dir_));
   }
 
   static void TearDownTestCase() {
     data_dir_.clear();
   }
 
-  virtual void SetUp() override {
+  void SetUp() override {
     // Create a temp directory for testing.
     ASSERT_TRUE(test_dir_.CreateUniqueTempDir());
   }
 
-  virtual void TearDown() override {
+  void TearDown() override {
     // Clean up test directory manually so we can fail if it leaks.
     ASSERT_TRUE(test_dir_.Delete());
   }
 
   // The path to input data used in tests.
   static base::FilePath data_dir_;
 
   // The temporary directory used to contain the test operations.
   base::ScopedTempDir test_dir_;
 };
 
 base::FilePath ArchivePatchHelperTest::data_dir_;
 
 }  // namespace
 
 // Test that patching works.
 TEST_F(ArchivePatchHelperTest, Patching) {
   base::FilePath src = data_dir_.AppendASCII("archive1.7z");
   base::FilePath patch = data_dir_.AppendASCII("archive.diff");
   base::FilePath dest = test_dir_.path().AppendASCII("archive2.7z");
   installer::ArchivePatchHelper archive_helper(test_dir_.path(),
                                                base::FilePath(),
                                                src,
                                                dest);
   archive_helper.set_last_uncompressed_file(patch);
   EXPECT_TRUE(archive_helper.EnsemblePatch() || archive_helper.BinaryPatch());
   base::FilePath base = data_dir_.AppendASCII("archive2.7z");
   EXPECT_TRUE(base::ContentsEqual(dest, base));
 }