Let ImportantFileWriter Use fdatasync

base/files/file_win.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/files/file.h"
 
 #include <io.h>
 
 #include "base/files/file_path.h"
 #include "base/logging.h"
@@ skipping 244 matching lines @@
           (::SetFilePointerEx(file_.Get(), file_pointer, NULL, FILE_BEGIN) !=
            FALSE));
 }
 
 bool File::Flush() {
   base::ThreadRestrictions::AssertIOAllowed();
   DCHECK(IsValid());
   return ::FlushFileBuffers(file_.Get()) != FALSE;
 }
 
+bool File::FlushData() {
+  return Flush();
+}
+
 bool File::SetTimes(Time last_access_time, Time last_modified_time) {
   base::ThreadRestrictions::AssertIOAllowed();
   DCHECK(IsValid());
 
   FILETIME last_access_filetime = last_access_time.ToFileTime();
   FILETIME last_modified_filetime = last_modified_time.ToFileTime();
   return (::SetFileTime(file_.Get(), NULL, &last_access_filetime,
                         &last_modified_filetime) != FALSE);
 }
 
@@ skipping 91 matching lines @@
                                   last_error);
       return FILE_ERROR_FAILED;
   }
 }
 
 void File::SetPlatformFile(PlatformFile file) {
   file_.Set(file);
 }
 
 }  // namespace base