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

chrome/browser/resources/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("//chrome/common/features.gni")
 import("//tools/grit/grit_rule.gni")
 
 grit("net_internals_resources") {
   source = "net_internals_resources.grd"
-  use_qualified_include = true
   defines = chrome_grit_defines
   outputs = [
     "grit/net_internals_resources.h",
     "net_internals_resources.pak",
   ]
   output_dir = "$root_gen_dir/chrome"
 }
 
 grit("invalidations_resources") {
   source = "invalidations_resources.grd"
-  use_qualified_include = true
   defines = chrome_grit_defines
   outputs = [
     "grit/invalidations_resources.h",
     "invalidations_resources.pak",
   ]
   output_dir = "$root_gen_dir/chrome"
 }
 
 grit("password_manager_internals_resources") {
   source = "password_manager_internals_resources.grd"
-  use_qualified_include = true
   defines = chrome_grit_defines
   outputs = [
     "grit/password_manager_internals_resources.h",
     "password_manager_internals_resources.pak",
   ]
   output_dir = "$root_gen_dir/chrome"
 }
 
 grit("policy_resources") {
   source = "md_policy/policy_resources.grd"
   defines = chrome_grit_defines
-
-  # TODO(thestig): use_qualified_include = true
   outputs = [
     "grit/policy_resources.h",
     "grit/policy_resources_map.cc",
     "grit/policy_resources_map.h",
     "policy_resources.pak",
   ]
   output_dir = "$root_gen_dir/chrome"
 }
 
 grit("task_scheduler_internals_resources") {
   source = "task_scheduler_internals/resources.grd"
-  use_qualified_include = true
   defines = chrome_grit_defines
   outputs = [
     "grit/task_scheduler_internals_resources.h",
     "task_scheduler_internals_resources.pak",
   ]
   output_dir = "$root_gen_dir/chrome"
 }
 
 grit("translate_internals_resources") {
   source = "translate_internals_resources.grd"
-  use_qualified_include = true
   defines = chrome_grit_defines
   outputs = [
     "grit/translate_internals_resources.h",
     "translate_internals_resources.pak",
   ]
   output_dir = "$root_gen_dir/chrome"
 }
 
 if (!is_ios && !is_android) {
   grit("component_extension_resources") {
     source = "component_extension_resources.grd"
-
-    # TODO(thestig): use_qualified_include = true
     defines = chrome_grit_defines
     if (enable_hangout_services_extension) {
       defines += [ "enable_hangout_services_extension" ]
     }
 
     outputs = [
       "grit/component_extension_resources.h",
       "grit/component_extension_resources_map.cc",
       "grit/component_extension_resources_map.h",
       "component_extension_resources.pak",
     ]
     output_dir = "$root_gen_dir/chrome"
   }
 
   grit("settings_resources") {
     if (use_vulcanize) {
       source = "settings/settings_resources_vulcanized.grd"
       deps = [
         "//chrome/browser/resources/settings:build",
       ]
       grit_flags = [
         "-E",
         "root_gen_dir=" + rebase_path(root_gen_dir, root_build_dir),
       ]
     } else {
       source = "settings/settings_resources.grd"
     }
 
-    # TODO(thestig): use_qualified_include = true
     defines = chrome_grit_defines
     outputs = [
       "grit/settings_resources.h",
       "grit/settings_resources_map.cc",
       "grit/settings_resources_map.h",
       "settings_resources.pak",
     ]
     output_dir = "$root_gen_dir/chrome"
   }
 
   grit("options_resources") {
     source = "options_resources.grd"
-    use_qualified_include = true
     defines = chrome_grit_defines
     outputs = [
       "grit/options_resources.h",
       "options_resources.pak",
     ]
     output_dir = "$root_gen_dir/chrome"
   }
 
   grit("options_test_resources") {
     source = "options_test_resources.grd"
-    use_qualified_include = true
     defines = chrome_grit_defines
     outputs = [
       "grit/options_test_resources.h",
       "options_test_resources.pak",
     ]
     output_dir = "$root_gen_dir/chrome"
   }
 }
 
 if (!is_ios) {
   grit("quota_internals_resources") {
     source = "quota_internals_resources.grd"
-    use_qualified_include = true
     defines = chrome_grit_defines
     outputs = [
       "grit/quota_internals_resources.h",
       "quota_internals_resources.pak",
     ]
     output_dir = "$root_gen_dir/chrome"
   }
 
   grit("webapks_ui_resources") {
     source = "webapks_ui_resources.grd"
-    use_qualified_include = true
     defines = chrome_grit_defines
     outputs = [
       "grit/webapks_ui_resources.h",
       "webapks_ui_resources.pak",
     ]
     output_dir = "$root_gen_dir/chrome"
   }
 }
 
 if (enable_extensions) {
   grit("sync_file_system_internals_resources") {
     source = "sync_file_system_internals_resources.grd"
-    use_qualified_include = true
     defines = chrome_grit_defines
     outputs = [
       "grit/sync_file_system_internals_resources.h",
       "sync_file_system_internals_resources.pak",
     ]
     output_dir = "$root_gen_dir/chrome"
   }
 }