make use of existing gn args in ui build config

ui/events/BUILD.gn

Index: ui/events/BUILD.gn
diff --git a/ui/events/BUILD.gn b/ui/events/BUILD.gn
index 59fe8358c2559c1b25cd5da0814c5b56a5233a2c..103ee50502d647e04f8352bf7a9b163ea0883280 100644
--- a/ui/events/BUILD.gn
+++ b/ui/events/BUILD.gn
@@ -2,6 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+import("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//ui/ozone/ozone.gni")
@@ -145,10 +146,7 @@ component("events") {
 
   if (use_x11) {
     sources += [ "x/events_x.cc" ]
-    configs += [
-      "//build/config/linux:glib",
-      "//build/config/linux:x11",
-    ]
+    configs += [ "//build/config/linux:x11" ]
     deps += [
       "//ui/events/devices",
       "//ui/events/devices/x11",
@@ -157,6 +155,10 @@ component("events") {
     ]
   }
 
+  if (use_glib) {
+    configs += [ "//build/config/linux:glib" ]
+  }
+
   if (use_ozone || (is_android && use_aura)) {
     sources += [ "events_default.cc" ]
   }