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

components/safe_json/utility/safe_json_parser_mojo_impl.cc

+// Copyright 2016 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/safe_json/utility/safe_json_parser_mojo_impl.h"
+
+#include <memory>
+#include <utility>
+
+#include "base/json/json_reader.h"
+#include "base/values.h"
+
+namespace safe_json {
+
+// static
+void SafeJsonParserMojoImpl::Create(
+    mojo::InterfaceRequest<mojom::SafeJsonParser> request) {
+  new SafeJsonParserMojoImpl(std::move(request));
+}
+
+SafeJsonParserMojoImpl::SafeJsonParserMojoImpl(
+    mojo::InterfaceRequest<mojom::SafeJsonParser> request)
+    : binding_(this, std::move(request)) {}
+
+SafeJsonParserMojoImpl::~SafeJsonParserMojoImpl() {
+}
+
+void SafeJsonParserMojoImpl::Parse(const mojo::String& json,
+                                   const ParseCallback& callback) {
+  int error_code;
+  std::string error;
+  std::unique_ptr<base::Value> value = base::JSONReader::ReadAndReturnError(
+      json.get(), base::JSON_PARSE_RFC, &error_code, &error);
+  base::ListValue wrapper;
+  if (value) {
+    wrapper.Append(std::move(value));
+    callback.Run(wrapper, nullptr);
+  } else {
+    callback.Run(wrapper, error);
+  }
+}
+
+}  // namespace safe_json