Revert "Move files in wtf/ to platform/wtf/"

third_party/WebKit/Source/wtf/ByteOrder.h

-// Copyright 2017 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.
+/*
+* Copyright (C) 2012 Google Inc. All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions are
+* met:
+*
+*     * Redistributions of source code must retain the above copyright
+* notice, this list of conditions and the following disclaimer.
+*     * Redistributions in binary form must reproduce the above
+* copyright notice, this list of conditions and the following disclaimer
+* in the documentation and/or other materials provided with the
+* distribution.
+*     * Neither the name of Google Inc. nor the names of its
+* contributors may be used to endorse or promote products derived from
+* this software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
 
-#include "platform/wtf/ByteOrder.h"
+#ifndef WTF_ByteOrder_h
+#define WTF_ByteOrder_h
 
-// The contents of this header was moved to platform/wtf as part of
-// WTF migration project. See the following post for details:
-// https://groups.google.com/a/chromium.org/d/msg/blink-dev/tLdAZCTlcAA/bYXVT8gYCAAJ
+#if OS(POSIX)
+#include <arpa/inet.h>
+#endif
+
+#if OS(WIN)
+
+#include "wtf/ByteSwap.h"
+#include "wtf/CPU.h"
+
+#if CPU(BIG_ENDIAN)
+inline uint16_t ntohs(uint16_t x) {
+  return x;
+}
+inline uint16_t htons(uint16_t x) {
+  return x;
+}
+inline uint32_t ntohl(uint32_t x) {
+  return x;
+}
+inline uint32_t htonl(uint32_t x) {
+  return x;
+}
+#elif CPU(MIDDLE_ENDIAN)
+inline uint16_t ntohs(uint16_t x) {
+  return x;
+}
+inline uint16_t htons(uint16_t x) {
+  return x;
+}
+inline uint32_t ntohl(uint32_t x) {
+  return WTF::wswap32(x);
+}
+inline uint32_t htonl(uint32_t x) {
+  return WTF::wswap32(x);
+}
+#else
+inline uint16_t ntohs(uint16_t x) {
+  return WTF::bswap16(x);
+}
+inline uint16_t htons(uint16_t x) {
+  return WTF::bswap16(x);
+}
+inline uint32_t ntohl(uint32_t x) {
+  return WTF::bswap32(x);
+}
+inline uint32_t htonl(uint32_t x) {
+  return WTF::bswap32(x);
+}
+#endif
+
+#endif  // OS(WIN)
+
+#endif  // WTF_ByteOrder_h