Generate the proto JSON converter for DOM distiller

third_party/dom_distiller_js/BUILD.gn

 # Copyright 2014 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.
 
 import("//third_party/protobuf/proto_library.gni")
 
-config("dependent_config") {
-  include_dirs = [ "//third_party/dom_distiller_js/dist/proto_gen" ]
-}
-
 source_set("proto") {
   public_deps = [
     ":dom_distiller_proto",
   ]
-  public_configs = [ ":dependent_config" ]
 }
 
 proto_library("dom_distiller_proto") {
   visibility = [ ":*" ]
   sources = [
     "dist/proto/dom_distiller.proto",
   ]
   proto_out_dir = "third_party/dom_distiller_js"
+  json_converter = "protoc_plugins/json_values_converter.py"
 }