Revert of Convert network hints to Mojo

components/network_hints/public/cpp/network_hints_param_traits.cc

-// Copyright 2014 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/network_hints/public/cpp/network_hints_param_traits.h"
-
-#include "base/strings/string_number_conversions.h"
-#include "components/network_hints/common/network_hints_common.h"
-
-namespace IPC {
-
-void ParamTraits<network_hints::LookupRequest>::GetSize(base::PickleSizer* s,
-                                                        const param_type& p) {
-  IPC::GetParamSize(s, p.hostname_list);
-}
-
-void ParamTraits<network_hints::LookupRequest>::Write(
-    base::Pickle* m,
-    const network_hints::LookupRequest& request) {
-  IPC::WriteParam(m, request.hostname_list);
-}
-
-bool ParamTraits<network_hints::LookupRequest>::Read(
-    const base::Pickle* m,
-    base::PickleIterator* iter,
-    network_hints::LookupRequest* request) {
-  // Verify the hostname limits after deserialization success.
-  if (IPC::ReadParam(m, iter, &request->hostname_list)) {
-    network_hints::NameList& hostnames = request->hostname_list;
-    if (hostnames.size() > network_hints::kMaxDnsHostnamesPerRequest)
-      return false;
-
-    for (const auto& hostname : hostnames) {
-      if (hostname.length() > network_hints::kMaxDnsHostnameLength)
-        return false;
-    }
-  }
-  return true;
-}
-
-void ParamTraits<network_hints::LookupRequest>::Log(
-    const network_hints::LookupRequest& p,
-    std::string* l) {
-  l->append("<network_hints::LookupRequest: ");
-  l->append(base::SizeTToString(p.hostname_list.size()));
-  l->append(" hostnames>");
-}
-
-}  // namespace IPC