Revert of Convert network hints to Mojo

components/network_hints/public/cpp/network_hints_param_traits.h

Index: components/network_hints/public/cpp/network_hints_param_traits.h
diff --git a/components/network_hints/public/cpp/network_hints_param_traits.h b/components/network_hints/public/cpp/network_hints_param_traits.h
deleted file mode 100644
index db9b73aa2e9df7716db137ae60b2f8d16cc5be49..0000000000000000000000000000000000000000
--- a/components/network_hints/public/cpp/network_hints_param_traits.h
+++ /dev/null
@@ -1,31 +0,0 @@
-// 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.
-
-#ifndef COMPONENTS_NETWORK_HINTS_COMMON_NETWORK_HINTS_PARAM_TRAITS_H_
-#define COMPONENTS_NETWORK_HINTS_COMMON_NETWORK_HINTS_PARAM_TRAITS_H_
-
-#include <string>
-#include <vector>
-
-#include "components/network_hints/common/network_hints_common.h"
-#include "ipc/ipc_message_macros.h"
-#include "ipc/ipc_message_utils.h"
-#include "url/ipc/url_param_traits.h"
-
-namespace IPC {
-
-template <>
-struct ParamTraits<network_hints::LookupRequest> {
-  typedef network_hints::LookupRequest param_type;
-  static void GetSize(base::PickleSizer* s, const param_type& p);
-  static void Write(base::Pickle* m, const param_type& p);
-  static bool Read(const base::Pickle* m,
-                   base::PickleIterator* iter,
-                   param_type* r);
-  static void Log(const param_type& p, std::string* l);
-};
-
-}  // namespace IPC
-
-#endif  // COMPONENTS_NETWORK_HINTS_COMMON_NETWORK_HINTS_PARAM_TRAITS_H_