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

chrome_elf/ntdll_cache_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 <windows.h>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "chrome_elf/ntdll_cache.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 class NTDLLCacheTest : public testing::Test {
  protected:
-  virtual void SetUp() override {
+  void SetUp() override {
     InitCache();
   }
 
 };
 
 TEST_F(NTDLLCacheTest, NtDLLCacheSanityCheck) {
   HMODULE ntdll_handle = ::GetModuleHandle(L"ntdll.dll");
   // Grab a couple random entries from the cache and make sure they match the
   // addresses exported by ntdll.
   EXPECT_EQ(::GetProcAddress(ntdll_handle, "A_SHAFinal"),
             g_ntdll_lookup["A_SHAFinal"]);
   EXPECT_EQ(::GetProcAddress(ntdll_handle, "ZwTraceControl"),
             g_ntdll_lookup["ZwTraceControl"]);
 }
 
 }  // namespace