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

chrome_elf/create_file/chrome_create_file_unittest.cc

 // 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.
 
 #include "chrome_elf/create_file/chrome_create_file.h"
 
 #include <windows.h>
 
 #include <bitset>
 #include <string>
@@ skipping 58 matching lines @@
         allocation_size,
         file_attributes,
         share_access,
         create_disposition,
         create_options,
         ea_buffer,
         ea_length,
         path);
   }
 
-  virtual void SetUp() override {
+  void SetUp() override {
     original_thread_ = base::PlatformThread::CurrentId();
     InitCache();
     PlatformTest::SetUp();
 
     base::FilePath user_data_dir;
     PathService::Get(base::DIR_LOCAL_APP_DATA, &user_data_dir);
     ASSERT_TRUE(temp_dir_.CreateUniqueTempDirUnderPath(user_data_dir));
     ASSERT_TRUE(temp_dir2_.CreateUniqueTempDir());
     self_ = this;
   }
@@ skipping 310 matching lines @@
   DoReadCheck(file_name, FILE_ATTRIBUTE_NORMAL, false);
 }
 
 TEST_F(ChromeCreateFileTest, ReadWriteFromThunk) {
   base::FilePath file_name = temp_dir_.path().Append(L"some_file.txt");
   DoWriteCheck(file_name, FILE_ATTRIBUTE_NORMAL, false);
   DoReadCheck(file_name, FILE_ATTRIBUTE_NORMAL, false);
 }
 
 }  // namespace