[Sync] Removing duplicated includes between cc and h files.

components/sync/base/node_ordinal.cc

 // Copyright (c) 2012 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 "components/sync/base/node_ordinal.h"
 
-#include <stddef.h>
-#include <stdint.h>
-
 #include <algorithm>
 #include <string>
 
 namespace syncer {
 
 NodeOrdinal Int64ToNodeOrdinal(int64_t x) {
   uint64_t y = static_cast<uint64_t>(x);
   y ^= 0x8000000000000000ULL;
   std::string bytes(NodeOrdinal::kMinLength, '\x00');
   if (y == 0) {
@@ skipping 22 matching lines @@
     const uint8_t byte = s[l - i - 1];
     y |= static_cast<uint64_t>(byte) << (i * 8);
   }
   y ^= 0x8000000000000000ULL;
   // This is technically implementation-defined if y > INT64_MAX, so
   // we're assuming that we're on a twos-complement machine.
   return static_cast<int64_t>(y);
 }
 
 }  // namespace syncer