Adds thunks for getting platform handles

mojo/platform_handle/platform_handle_functions.h

Index: mojo/platform_handle/platform_handle_functions.h
diff --git a/mojo/platform_handle/platform_handle_functions.h b/mojo/platform_handle/platform_handle_functions.h
new file mode 100644
index 0000000000000000000000000000000000000000..dec5d1f187492ddb558d4c3424875fda68639118
--- /dev/null
+++ b/mojo/platform_handle/platform_handle_functions.h
@@ -0,0 +1,27 @@
+// Copyright 2015 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 MOJO_PLATFORM_HANDLE_PLATFORM_HANDLE_FUNCTIONS_H_
+#define MOJO_PLATFORM_HANDLE_PLATFORM_HANDLE_FUNCTIONS_H_
+
+#include "mojo/platform_handle/platform_handle.h"
+#include "mojo/platform_handle/platform_handle_exports.h"
+#include "third_party/mojo/src/mojo/public/c/system/types.h"
+
+extern "C" {
+
+// Wraps |platform_handle| in a MojoHandle so that it can transported, returns
+// true on success. This takes ownership of |platform_handle|, regardless of
+// whether this succeeds.
+PLATFORM_HANDLE_EXPORT MojoResult
+MojoCreatePlatformHandleWrapper(MojoPlatformHandle platform_handle,
+                                MojoHandle* wrapper);
+
+PLATFORM_HANDLE_EXPORT MojoResult
+MojoExtractPlatformHandle(MojoHandle wrapper,
+                          MojoPlatformHandle* platform_handle);
+
+}  // extern "C"
+
+#endif  // MOJO_PLATFORM_HANDLE_PLATFORM_HANDLE_FUNCTIONS_H_