Cleanup: Remove unneeded base/file_util.h includes in base.

base/memory/singleton_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/at_exit.h"
-#include "base/file_util.h"
 #include "base/memory/singleton.h"
 #include "base/path_service.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace {
 
 COMPILE_ASSERT(DefaultSingletonTraits<int>::kRegisterAtExit == true, a);
 
 typedef void (*CallbackFunc)();
 
@@ skipping 263 matching lines @@
   AlignedTestSingleton<AlignedMemory<128, 128> >* align128 =
       AlignedTestSingleton<AlignedMemory<128, 128> >::GetInstance();
   AlignedTestSingleton<AlignedMemory<4096, 4096> >* align4096 =
       AlignedTestSingleton<AlignedMemory<4096, 4096> >::GetInstance();
 
   EXPECT_ALIGNED(align4, 4);
   EXPECT_ALIGNED(align32, 32);
   EXPECT_ALIGNED(align128, 128);
   EXPECT_ALIGNED(align4096, 4096);
 }