Cleanup: Get rid of OS_WIN/OS_POSIX ifdefs from MojoApplication

base/files/platform_file.h

Index: base/files/platform_file.h
diff --git a/base/files/platform_file.h b/base/files/platform_file.h
new file mode 100644
index 0000000000000000000000000000000000000000..66a76f4c87defa8e8b4c86468fba10a0d46a156c
--- /dev/null
+++ b/base/files/platform_file.h
@@ -0,0 +1,25 @@
+// Copyright 2014 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_PLATFORM_FILE_H_
+#define BASE_FILES_PLATFORM_FILE_H_
+
+#include "build/build_config.h"
+#if defined(OS_WIN)
+#include <windows.h>
+#endif
+
+namespace base {
+
+#if defined(OS_WIN)
+typedef HANDLE PlatformFile;
+const PlatformFile kInvalidPlatformFile = INVALID_HANDLE_VALUE;
+#elif defined(OS_POSIX)
+typedef int PlatformFile;
+const PlatformFile kInvalidPlatformFile = -1;
+#endif  // defined(OS_POSIX)
+
+} // namespace base
+
+#endif // BASE_FILES_PLATFORM_FILE_H_