Mojo C++ bindings: Remove more use_new_wrapper_types=false.

components/safe_json/utility/safe_json_parser_mojo_impl.h

 // Copyright 2013 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_MOJO_IMPL_H_
 #define COMPONENTS_SAFE_JSON_SAFE_JSON_PARSER_MOJO_IMPL_H_
 
 #include <string>
 
 #include "base/macros.h"
 #include "components/safe_json/public/interfaces/safe_json.mojom.h"
 
 namespace safe_json {
 
 class SafeJsonParserMojoImpl : public mojom::SafeJsonParser {
  public:
   SafeJsonParserMojoImpl();
   ~SafeJsonParserMojoImpl() override;
 
   static void Create(mojo::InterfaceRequest<mojom::SafeJsonParser> request);
 
  private:
   // mojom::SafeJsonParser implementation.
-  void Parse(const mojo::String& json, const ParseCallback& callback) override;
+  void Parse(const std::string& json, const ParseCallback& callback) override;
 
   DISALLOW_COPY_AND_ASSIGN(SafeJsonParserMojoImpl);
 };
 
 }  // namespace safe_json
 
 #endif  // COMPONENTS_SAFE_JSON_SAFE_JSON_PARSER_MOJO_IMPL_H_