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

android_webview/BUILD.gn

 # Copyright 2015 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("//android_webview/system_webview_apk_tmpl.gni")
 import("//android_webview/webview_repack_locales.gni")
 import("//build/config/android/config.gni")
 import("//build/config/android/rules.gni")
 import("//build/config/locales.gni")
 import("//components/spellcheck/spellcheck_build_features.gni")
@@ skipping 200 matching lines @@
   outputs = [
     "grit/webui_resources.h",
     "grit/webui_resources_map.h",
     "grit/webui_resources_map.cc",
     "webui_resources.pak",
   ]
 }
 
 grit("generate_components_resources") {
   source = "../components/resources/components_resources.grd"
-  use_qualified_include = true
 
   # See :generate_webui_resources for an explanation of the whitelist
   whitelist = rebase_path("ui/grit_resources_whitelist.txt")
   inputs = [
     whitelist,
   ]
   grit_flags = [
     "-w",
     whitelist,
   ]
   outputs = [
     "grit/components_resources.h",
     "components_resources.pak",
   ]
 }
 
 grit("generate_components_strings") {
   source = "../components/components_strings.grd"
-  use_qualified_include = true
 
   # components_strings contains strings from all components. WebView
   # will never display most of them, so we try to limit the included
   # strings. This whitelist trims about 50% more than the compile-based
   # whitelist generated by :system_webview_pak_whitelist.
   whitelist = rebase_path("ui/grit_strings_whitelist.txt")
   inputs = [
     whitelist,
   ]
   grit_flags = [
@@ skipping 550 matching lines @@
   system_webview_apk_tmpl("system_webview_apk") {
     android_manifest = system_webview_android_manifest
     android_manifest_dep = ":system_webview_manifest"
     deps = [
       ":system_webview_resources",
       "//android_webview/glue",
     ]
     apk_name = "SystemWebView"
   }
 }