Add a flag to open files in share delete mode

base/platform_file_win.cc

 // 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.
 
 #include "base/platform_file.h"
 
 #include "base/file_path.h"
 #include "base/logging.h"
 #include "base/threading/thread_restrictions.h"
 
@@ skipping 40 matching lines @@
 
   DWORD access = (flags & PLATFORM_FILE_READ) ? GENERIC_READ : 0;
   if (flags & PLATFORM_FILE_WRITE)
     access |= GENERIC_WRITE;
   if (flags & PLATFORM_FILE_WRITE_ATTRIBUTES)
     access |= FILE_WRITE_ATTRIBUTES;
 
   DWORD sharing = (flags & PLATFORM_FILE_EXCLUSIVE_READ) ? 0 : FILE_SHARE_READ;
   if (!(flags & PLATFORM_FILE_EXCLUSIVE_WRITE))
     sharing |= FILE_SHARE_WRITE;
+  if (flags & PLATFORM_FILE_SHARE_DELETE)
+    sharing |= FILE_SHARE_DELETE;
 
   DWORD create_flags = 0;
   if (flags & PLATFORM_FILE_ASYNC)
     create_flags |= FILE_FLAG_OVERLAPPED;
   if (flags & PLATFORM_FILE_TEMPORARY)
     create_flags |= FILE_ATTRIBUTE_TEMPORARY;
   if (flags & PLATFORM_FILE_HIDDEN)
     create_flags |= FILE_ATTRIBUTE_HIDDEN;
   if (flags & PLATFORM_FILE_DELETE_ON_CLOSE)
     create_flags |= FILE_FLAG_DELETE_ON_CLOSE;
@@ skipping 140 matching lines @@
   info->is_directory =
       file_info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY != 0;
   info->is_symbolic_link = false; // Windows doesn't have symbolic links.
   info->last_modified = base::Time::FromFileTime(file_info.ftLastWriteTime);
   info->last_accessed = base::Time::FromFileTime(file_info.ftLastAccessTime);
   info->creation_time = base::Time::FromFileTime(file_info.ftCreationTime);
   return true;
 }
 
 }  // namespace disk_cache