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

components/safe_json/safe_json_parser_messages.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.
-
-// Message definition file, included multiple times, hence no include guard.
-
-#include <string>
-#include <vector>
-
-#include "base/strings/string16.h"
-#include "ipc/ipc_message_macros.h"
-#include "ipc/ipc_message_utils.h"
-
-#define IPC_MESSAGE_START SafeJsonParserMsgStart
-
-//------------------------------------------------------------------------------
-// Process messages:
-// This is a message from the browser to the utility process telling it to parse
-// a JSON string into a Value object.
-IPC_MESSAGE_CONTROL1(SafeJsonParserMsg_ParseJSON,
-                     std::string /* JSON to parse */)
-
-//------------------------------------------------------------------------------
-// Host messages: Reply when the utility process successfully parsed a JSON
-// string.
-//
-// WARNING: The result can be of any Value subclass type, but we can't easily
-// pass indeterminate value types by const object reference with our IPC macros,
-// so we put the result Value into a ListValue. Handlers should examine the
-// first (and only) element of the ListValue for the actual result.
-IPC_MESSAGE_CONTROL1(SafeJsonParserHostMsg_ParseJSON_Succeeded, base::ListValue)
-
-// Reply when the utility process failed in parsing a JSON string.
-IPC_MESSAGE_CONTROL1(SafeJsonParserHostMsg_ParseJSON_Failed,
-                     std::string /* error message, if any*/)