Re-land: Convert the utility process JSON parser into a Mojo service.

components/safe_json/safe_json_parser_message_filter.h

-// 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.
-
-#ifndef COMPONENTS_SAFE_JSON_SAFE_JSON_PARSER_MESSAGE_FILTER_H_
-#define COMPONENTS_SAFE_JSON_SAFE_JSON_PARSER_MESSAGE_FILTER_H_
-
-#include <string>
-
-#include "base/macros.h"
-
-namespace IPC {
-class Message;
-}  // namespace IPC
-
-namespace safe_json {
-
-// A Handler for the ParseJSON IPC message that does the actual JSON parsing
-// in the sandboxed process. Modelled after IPC::MessageFilter but does not
-// directly implement it as it will be used by an adapter class under
-// //chrome/utility.
-class SafeJsonParserMessageFilter {
- public:
-  SafeJsonParserMessageFilter();
-  ~SafeJsonParserMessageFilter();
-  // Returns true if it receives a message it could handle (currently
-  // only SafeJsonParserMsg_ParseJSON), false otherwise.
-  bool OnMessageReceived(const IPC::Message& message);
-
- private:
-  void OnParseJSON(const std::string& json);
-
-  DISALLOW_COPY_AND_ASSIGN(SafeJsonParserMessageFilter);
-};
-
-}  // namespace safe_json
-
-#endif  // COMPONENTS_SAFE_JSON_SAFE_JSON_PARSER_MESSAGE_FILTER_H_