Standardize usage of virtual/override/final specifiers in base/.

base/files/file_util_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 "build/build_config.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <shellapi.h>
 #include <shlobj.h>
@@ skipping 166 matching lines @@
 
 const wchar_t bogus_content[] = L"I'm cannon fodder.";
 
 const int FILES_AND_DIRECTORIES =
     FileEnumerator::FILES | FileEnumerator::DIRECTORIES;
 
 // file_util winds up using autoreleased objects on the Mac, so this needs
 // to be a PlatformTest
 class FileUtilTest : public PlatformTest {
  protected:
-  virtual void SetUp() override {
+  void SetUp() override {
     PlatformTest::SetUp();
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDir());
   }
 
   ScopedTempDir temp_dir_;
 };
 
 // Collects all the results from the given file enumerator, and provides an
 // interface to query whether a given file is present.
 class FindResultCollector {
@@ skipping 1965 matching lines @@
 // Testing VerifyPathControlledByAdmin() is hard, because there is no
 // way a test can make a file owned by root, or change file paths
 // at the root of the file system.  VerifyPathControlledByAdmin()
 // is implemented as a call to VerifyPathControlledByUser, which gives
 // us the ability to test with paths under the test's temp directory,
 // using a user id we control.
 // Pull tests of VerifyPathControlledByUserTest() into a separate test class
 // with a common SetUp() method.
 class VerifyPathControlledByUserTest : public FileUtilTest {
  protected:
-  virtual void SetUp() override {
+  void SetUp() override {
     FileUtilTest::SetUp();
 
     // Create a basic structure used by each test.
     // base_dir_
     //  |-> sub_dir_
     //       |-> text_file_
 
     base_dir_ = temp_dir_.path().AppendASCII("base_dir");
     ASSERT_TRUE(CreateDirectory(base_dir_));
 
@@ skipping 422 matching lines @@
   // Trying to close it should crash. This is important for security.
   EXPECT_DEATH(CloseWithScopedFD(fds[1]), "");
 #endif
 }
 
 #endif  // defined(OS_POSIX)
 
 }  // namespace
 
 }  // namespace base