Change default fopen() on Windows from fopen_s() to fsopen(,,_SH_DENYNO).

base/file_util_win.cc

 // Copyright (c) 2010 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/file_util.h"
 
 #include <windows.h>
 #include <propvarutil.h>
 #include <shellapi.h>
 #include <shlobj.h>
@@ skipping 591 matching lines @@
   ScopedHandle file_handle(
       CreateFile(file_path.value().c_str(), FILE_WRITE_ATTRIBUTES,
                  FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
                  OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL));
   BOOL ret = SetFileTime(file_handle.Get(), NULL, &timestamp, &timestamp);
   return ret != 0;
 }
 
 FILE* OpenFile(const FilePath& filename, const char* mode) {
   std::wstring w_mode = ASCIIToWide(std::string(mode));
-  FILE* file;
-  if (_wfopen_s(&file, filename.value().c_str(), w_mode.c_str()) != 0) {
-    return NULL;
-  }
-  return file;
+  return _wfsopen(filename.value().c_str(), w_mode.c_str(), _SH_DENYNO);
 }
 
 FILE* OpenFile(const std::string& filename, const char* mode) {
-  FILE* file;
-  if (fopen_s(&file, filename.c_str(), mode) != 0) {
-    return NULL;
-  }
-  return file;
+  return _fsopen(filename.c_str(), mode, _SH_DENYNO);
 }
 
 int ReadFile(const FilePath& filename, char* data, int size) {
   ScopedHandle file(CreateFile(filename.value().c_str(),
                                GENERIC_READ,
                                FILE_SHARE_READ | FILE_SHARE_WRITE,
                                NULL,
                                OPEN_EXISTING,
                                FILE_FLAG_SEQUENTIAL_SCAN,
                                NULL));
@@ skipping 243 matching lines @@
 }
 
 bool HasFileBeenModifiedSince(const FileEnumerator::FindInfo& find_info,
                               const base::Time& cutoff_time) {
   long result = CompareFileTime(&find_info.ftLastWriteTime,
                                 &cutoff_time.ToFileTime());
   return result == 1 || result == 0;
 }
 
 }  // namespace file_util