Fix remoting_unittests that are failing on 32-bit linux

build/linux/libgio/BUILD.gn

 # Copyright 2016 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("//tools/generate_library_loader/generate_library_loader.gni")
 
 # This generates a target named "libgio".
 generate_library_loader("libgio") {
   name = "LibGioLoader"
   output_h = "libgio.h"
   output_cc = "libgio_loader.cc"
   header = "<gio/gio.h>"
   config = "//build/linux:gio_config"
 
   functions = [
+    "g_type_init",
     "g_settings_new",
     "g_settings_get_child",
     "g_settings_get_string",
     "g_settings_get_boolean",
     "g_settings_get_int",
     "g_settings_get_strv",
     "g_settings_list_schemas",
   ]
 }