Convert base::file_util to use File instead of PlatformFile.

net/disk_cache/simple/simple_version_upgrade.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 "net/disk_cache/simple/simple_version_upgrade.h"
 
 #include <cstring>
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/files/memory_mapped_file.h"
 #include "base/logging.h"
 #include "base/pickle.h"
+#include "base/platform_file.h"
 #include "net/disk_cache/simple/simple_backend_version.h"
 #include "net/disk_cache/simple/simple_entry_format_history.h"
 #include "third_party/zlib/zlib.h"
 
 namespace {
 
 // It is not possible to upgrade cache structures on disk that are of version
 // below this, the entire cache should be dropped for them.
 const uint32 kMinVersionAbleToUpgrade = 5;
 
@@ skipping 170 matching lines @@
     }
   }
   // Verify during the test stage that the upgraders are implemented for all
   // versions. The release build would cause backend initialization failure
   // which would then later lead to removing all files known to the backend.
   DCHECK_EQ(kSimpleVersion, version_from);
   return false;
 }
 
 }  // namespace disk_cache