Hooking MHTML generation to the browser.

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 199 matching lines @@
   info->size = size.QuadPart;
   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;
 }
 
+PlatformFile GetFileHandleForProcess(PlatformFile file,
+                                     ProcessHandle process,
+                                     bool close_source_handle) {
+  if (file == base::kInvalidPlatformFileValue)
+    return base::kInvalidPlatformFileValue;
+
+  PlatformFile result = base::kInvalidPlatformFileValue;
+  // Note that when |close_source_handle| is true, |file| is closed whether or
+  // not DuplicateHandle succeeds.
+  DuplicateHandle(GetCurrentProcess(), file, process, &result, 0, false,
+                  DUPLICATE_SAME_ACCESS |
+                      (close_source_handle ? DUPLICATE_CLOSE_SOURCE : 0));
+  return result;
+}
+
 }  // namespace disk_cache