Revert of Adds thunks for getting platform handles

mojo/runner/platform_handle_impl.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.h"
-#include "third_party/mojo/src/mojo/edk/embedder/embedder.h"
-
-extern "C" {
-
-MojoResult MojoCreatePlatformHandleWrapper(MojoPlatformHandle platform_handle,
-                                           MojoHandle* wrapper) {
-  mojo::embedder::PlatformHandle platform_handle_wrapper(platform_handle);
-  mojo::embedder::ScopedPlatformHandle scoped_platform_handle(
-      platform_handle_wrapper);
-  return mojo::embedder::CreatePlatformHandleWrapper(
-      scoped_platform_handle.Pass(), wrapper);
-}
-
-MojoResult MojoExtractPlatformHandle(MojoHandle wrapper,
-                                     MojoPlatformHandle* platform_handle) {
-  mojo::embedder::ScopedPlatformHandle scoped_platform_handle;
-  MojoResult result = mojo::embedder::PassWrappedPlatformHandle(
-      wrapper, &scoped_platform_handle);
-  if (result != MOJO_RESULT_OK)
-    return result;
-
-  DCHECK(scoped_platform_handle.is_valid());
-#if defined(OS_POSIX)
-  *platform_handle = scoped_platform_handle.release().fd;
-#elif defined(OS_WIN)
-  *platform_handle = scoped_platform_handle.release().handle;
-#else
-#error "Platform not yet supported."
-#endif
-  return MOJO_RESULT_OK;
-}
-
-}  // extern "C"