Made old dart:json library use convert to parse JSON.

runtime/vm/bootstrap.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/bootstrap.h"
 
 #include "include/dart_api.h"
 
 #include "vm/bootstrap_natives.h"
 #include "vm/compiler.h"
@@ skipping 23 matching lines @@
                core,
                Bootstrap::corelib_source_paths_,
                Bootstrap::corelib_patch_paths_),
   INIT_LIBRARY(ObjectStore::kAsync,
                async,
                Bootstrap::async_source_paths_,
                Bootstrap::async_patch_paths_),
   INIT_LIBRARY(ObjectStore::kConvert,
                convert,
                Bootstrap::convert_source_paths_,
-               NULL),
+               Bootstrap::convert_patch_paths_),
   INIT_LIBRARY(ObjectStore::kCollection,
                collection,
                Bootstrap::collection_source_paths_,
                Bootstrap::collection_patch_paths_),
   INIT_LIBRARY(ObjectStore::kCollectionDev,
                _collection-dev,
                Bootstrap::collection_dev_source_paths_,
                Bootstrap::collection_dev_patch_paths_),
   INIT_LIBRARY(ObjectStore::kIsolate,
                isolate,
                Bootstrap::isolate_source_paths_,
                Bootstrap::isolate_patch_paths_),
   INIT_LIBRARY(ObjectStore::kJson,
                json,
                Bootstrap::json_source_paths_,
-               Bootstrap::json_patch_paths_),
+               NULL),
   INIT_LIBRARY(ObjectStore::kMath,
                math,
                Bootstrap::math_source_paths_,
                Bootstrap::math_patch_paths_),
   INIT_LIBRARY(ObjectStore::kMirrors,
                mirrors,
                Bootstrap::mirrors_source_paths_,
                Bootstrap::mirrors_patch_paths_),
   INIT_LIBRARY(ObjectStore::kTypedData,
                typed_data,
@@ skipping 249 matching lines @@
   // Exit the Dart scope.
   Dart_ExitScope();
 
   // Restore the library tag handler for the isolate.
   isolate->set_library_tag_handler(saved_tag_handler);
 
   return error.raw();
 }
 
 }  // namespace dart