[mojo-edk] Expose portable API for platform handle wrapping

mojo/platform_handle/platform_handle_functions.cc

-// 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.
-
-#include "mojo/platform_handle/platform_handle_functions.h"
-
-#include <utility>
-
-#include "mojo/edk/embedder/embedder.h"
-
-extern "C" {
-
-MojoResult MojoCreatePlatformHandleWrapper(MojoPlatformHandle platform_handle,
-                                           MojoHandle* wrapper) {
-  mojo::edk::PlatformHandle platform_handle_wrapper(platform_handle);
-  mojo::edk::ScopedPlatformHandle scoped_platform_handle(
-      platform_handle_wrapper);
-  return mojo::edk::CreatePlatformHandleWrapper(
-      std::move(scoped_platform_handle), wrapper);
-}
-
-MojoResult MojoExtractPlatformHandle(MojoHandle wrapper,
-                                     MojoPlatformHandle* platform_handle) {
-  mojo::edk::ScopedPlatformHandle scoped_platform_handle;
-  MojoResult result =
-      mojo::edk::PassWrappedPlatformHandle(wrapper, &scoped_platform_handle);
-  if (result != MOJO_RESULT_OK)
-    return result;
-
-  DCHECK(scoped_platform_handle.is_valid());
-  *platform_handle = scoped_platform_handle.release().handle;
-  return MOJO_RESULT_OK;
-}
-
-}  // extern "C"