Support Windows FILE_FLAG_SEQUENTIAL_SCAN in base::File.

base/files/file.h

 // 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.
 
 #ifndef BASE_FILES_FILE_H_
 #define BASE_FILES_FILE_H_
 
 #include "build/build_config.h"
 #if defined(OS_WIN)
 #include <windows.h>
@@ skipping 67 matching lines @@
     FLAG_EXCLUSIVE_WRITE = 1 << 9,
     FLAG_ASYNC = 1 << 10,
     FLAG_TEMPORARY = 1 << 11,       // Used on Windows only.
     FLAG_HIDDEN = 1 << 12,          // Used on Windows only.
     FLAG_DELETE_ON_CLOSE = 1 << 13,
     FLAG_WRITE_ATTRIBUTES = 1 << 14,  // Used on Windows only.
     FLAG_SHARE_DELETE = 1 << 15,      // Used on Windows only.
     FLAG_TERMINAL_DEVICE = 1 << 16,   // Serial port flags.
     FLAG_BACKUP_SEMANTICS = 1 << 17,  // Used on Windows only.
     FLAG_EXECUTE = 1 << 18,           // Used on Windows only.
+    FLAG_SEQUENTIAL_SCAN = 1 << 19,   // Used on Windows only.
   };
 
   // This enum has been recorded in multiple histograms. If the order of the
   // fields needs to change, please ensure that those histograms are obsolete or
   // have been moved to a different enum.
   //
   // FILE_ERROR_ACCESS_DENIED is returned when a call fails because of a
   // filesystem restriction. FILE_ERROR_SECURITY is returned when a browser
   // policy doesn't allow the operation to be executed.
   enum Error {
@@ skipping 235 matching lines @@
 
   Error error_details_;
   bool created_;
   bool async_;
 };
 
 }  // namespace base
 
 #endif  // BASE_FILES_FILE_H_