Remove android_java_ui as it is not used

chrome/common/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("//build/buildflag_header.gni")
 import("//build/util/process_version.gni")
 import("//chrome/common/features.gni")
 import("//chrome/process_version_rc_template.gni")  # For branding_file_path.
 import("//extensions/features/features.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
@@ skipping 13 matching lines @@
   output_name = "common_resources"
   outputs = [
     "grit/common_resources.h",
     "common_resources.pak",
   ]
 }
 
 buildflag_header("features") {
   header = "features.h"
   flags = [
-    "ANDROID_JAVA_UI=$android_java_ui",
     "ENABLE_APP_LIST=$enable_app_list",
     "ENABLE_BACKGROUND=$enable_background",
     "ENABLE_BASIC_PRINT_DIALOG=$enable_basic_print_dialog",
     "ENABLE_CAPTIVE_PORTAL_DETECTION=$enable_captive_portal_detection",
     "ENABLE_GOOGLE_NOW=$enable_google_now",
     "ENABLE_HANGOUT_SERVICES_EXTENSION=$enable_hangout_services_extension",
     "ENABLE_ONE_CLICK_SIGNIN=$enable_one_click_signin",
     "ENABLE_PACKAGE_MASH_SERVICES=$enable_package_mash_services",
     "ENABLE_PLUGIN_INSTALLATION=$enable_plugin_installation",
     "ENABLE_SERVICE_DISCOVERY=$enable_service_discovery",
@@ skipping 637 matching lines @@
     "renderer_configuration.mojom",
     "resource_usage_reporter.mojom",
     "shell_handler_win.mojom",
   ]
 
   public_deps = [
     "//components/content_settings/core/common:mojo_bindings",
     "//url/mojo:url_mojom_gurl",
   ]
 }