Make it possible for a navigator.connect service to receive messages as base::Value.

content/shell/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("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//tools/grit/repack.gni")
 import("//tools/grit/grit_rule.gni")
 if (is_android) {
   import("//build/config/android/config.gni")
@@ skipping 41 matching lines @@
     "browser/layout_test/layout_test_content_browser_client.cc",
     "browser/layout_test/layout_test_content_browser_client.h",
     "browser/layout_test/layout_test_devtools_frontend.cc",
     "browser/layout_test/layout_test_devtools_frontend.h",
     "browser/layout_test/layout_test_download_manager_delegate.cc",
     "browser/layout_test/layout_test_download_manager_delegate.h",
     "browser/layout_test/layout_test_javascript_dialog_manager.cc",
     "browser/layout_test/layout_test_javascript_dialog_manager.h",
     "browser/layout_test/layout_test_message_filter.cc",
     "browser/layout_test/layout_test_message_filter.h",
+    "browser/layout_test/layout_test_navigator_connect_service_factory.cc",
+    "browser/layout_test/layout_test_navigator_connect_service_factory.h",
     "browser/layout_test/layout_test_notification_manager.cc",
     "browser/layout_test/layout_test_notification_manager.h",
     "browser/layout_test/layout_test_push_messaging_service.cc",
     "browser/layout_test/layout_test_push_messaging_service.h",
     "browser/layout_test/layout_test_resource_dispatcher_host_delegate.cc",
     "browser/layout_test/layout_test_resource_dispatcher_host_delegate.h",
     "browser/layout_test/layout_test_url_request_context_getter.cc",
     "browser/layout_test/layout_test_url_request_context_getter.h",
     "browser/notify_done_forwarder.cc",
     "browser/notify_done_forwarder.h",
@@ skipping 446 matching lines @@
       # image diff rather than having content shell depend on it.
       datadeps = [
         "//tools/imagediff($host_toolchain)",
       ]
     }
   }
 } else {
   group("content_shell") {
   }
 }