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diff --git a/ipc/ipc_platform_file.h b/ipc/ipc_platform_file.h
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+// 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 IPC_IPC_PLATFORM_FILE_H_
+#define IPC_IPC_PLATFORM_FILE_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "base/platform_file.h"
+#include "base/process.h"
+#include "ipc/ipc_export.h"
+
+#if defined(OS_POSIX)
+#include "base/file_descriptor_posix.h"
+#endif
+
+namespace IPC {
+
+#if defined(OS_WIN)
+typedef base::PlatformFile PlatformFileForTransit;
+#elif defined(OS_POSIX)
+typedef base::FileDescriptor PlatformFileForTransit;
+#endif
+
+inline PlatformFileForTransit InvalidPlatformFileForTransit() {
+#if defined(OS_WIN)
+ return base::kInvalidPlatformFileValue;
+#elif defined(OS_POSIX)
+ return base::FileDescriptor();
+#endif
+}
+
+inline base::PlatformFile PlatformFileForTransitToPlatformFile(
+ const PlatformFileForTransit& transit) {
+#if defined(OS_WIN)
+ return transit;
+#elif defined(OS_POSIX)
+ return transit.fd;
+#endif
+}
+
+// Returns a file handle equivalent to |file| that can be used in |process|.
+IPC_EXPORT PlatformFileForTransit GetFileHandleForProcess(
+ base::PlatformFile file,
+ base::ProcessHandle process,
+ bool close_source_handle);
+
+} // namespace IPC
+
+#endif // IPC_IPC_PLATFORM_FILE_H_