Introduce SerializeDictionaryForest for devtools_target_ui

chrome/browser/devtools/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.
 
 if (!is_android) {
   import("//build/config/features.gni")
   import("//chrome/common/features.gni")
   import("//tools/grit/grit_rule.gni")
 }
 
@@ skipping 114 matching lines @@
       "devtools_toggle_action.cc",
       "devtools_toggle_action.h",
       "devtools_ui_bindings.cc",
       "devtools_ui_bindings.h",
       "devtools_window.cc",
       "devtools_window.h",
       "global_confirm_info_bar.cc",
       "global_confirm_info_bar.h",
       "remote_debugging_server.cc",
       "remote_debugging_server.h",
+      "serialize_host_descriptions.cc",
+      "serialize_host_descriptions.h",
       "url_constants.cc",
       "url_constants.h",
     ]
     if (enable_service_discovery) {
       sources += [
         "device/cast_device_provider.cc",
         "device/cast_device_provider.h",
       ]
     }
   }
 }