Add a flag to open files in share delete mode

base/platform_file.h

 // Copyright (c) 2011 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_PLATFORM_FILE_H_
 #define BASE_PLATFORM_FILE_H_
 #pragma once
 
 #include "build/build_config.h"
 #if defined(OS_WIN)
@@ skipping 32 matching lines @@
   PLATFORM_FILE_WRITE = 64,
   PLATFORM_FILE_EXCLUSIVE_READ = 128,  // EXCLUSIVE is opposite of Windows SHARE
   PLATFORM_FILE_EXCLUSIVE_WRITE = 256,
   PLATFORM_FILE_ASYNC = 512,
   PLATFORM_FILE_TEMPORARY = 1024,       // Used on Windows only
   PLATFORM_FILE_HIDDEN = 2048,          // Used on Windows only
   PLATFORM_FILE_DELETE_ON_CLOSE = 4096,
 
   PLATFORM_FILE_WRITE_ATTRIBUTES = 8192,  // Used on Windows only
   PLATFORM_FILE_ENUMERATE = 16384,  // May enumerate directory
+
+  PLATFORM_FILE_SHARE_DELETE = 32768,  // Used on Windows only
 };
 
 // PLATFORM_FILE_ERROR_ACCESS_DENIED is returned when a call fails because of
 // a filesystem restriction. PLATFORM_FILE_ERROR_SECURITY is returned when a
 // browser policy doesn't allow the operation to be executed.
 enum PlatformFileError {
   PLATFORM_FILE_OK = 0,
   PLATFORM_FILE_ERROR_FAILED = -1,
   PLATFORM_FILE_ERROR_IN_USE = -2,
   PLATFORM_FILE_ERROR_EXISTS = -3,
@@ skipping 111 matching lines @@
     return temp;
   }
 
  private:
   PlatformFile* value_;
 };
 
 }  // namespace base
 
 #endif  // BASE_PLATFORM_FILE_H_