Stop setting use_qualified_include to true now that that is the default.

ios/chrome/app/resources/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("//build/config/chrome_build.gni")
 import("//build/config/ios/rules.gni")
 import("//build/config/locales.gni")
 import("//ios/chrome/app/resources/ios_chrome_repack.gni")
 import("//ios/chrome/tools/strings/generate_localizable_strings.gni")
 import("//ios/public/provider/chrome/browser/build_config.gni")
 import("//tools/grit/grit_rule.gni")
 
 group("resources") {
   public_deps = [
     ":launchscreen_xib",
     ":quick_action_icons",
     ":system_strings",
     ios_application_icons_target,
     ios_packed_resources_target,
   ]
 }
 
 grit("ios_resources") {
   source = "ios_resources.grd"
   output_dir = "$root_gen_dir/ios/chrome"
-  use_qualified_include = true
   outputs = [
     "grit/ios_resources.h",
     "ios_resources.pak",
   ]
 }
 
 group("packed_resources") {
   public_deps = [
     ":repack_locales",
     ":repack_scalable_resources",
@@ skipping 95 matching lines @@
   datapack_dir = get_label_info(ios_packed_resources_target, "target_gen_dir")
   packed_locales = ios_packed_locales_as_mac_outputs
   output_filenames = [
     "InfoPlist.strings",
     "Localizable.strings",
   ]
   deps = [
     ios_packed_resources_target,
   ]
 }