Test X11 header pollution

media/gpu/args.gni

Index: media/gpu/args.gni
diff --git a/media/gpu/args.gni b/media/gpu/args.gni
new file mode 100644
index 0000000000000000000000000000000000000000..c1511d98ed4ef7bdc033e935e034fa109eb52735
--- /dev/null
+++ b/media/gpu/args.gni
@@ -0,0 +1,12 @@
+# 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.
+
+declare_args() {
+  # Indicates if V4L plugin is used.
+  use_v4lplugin = false
+
+  # Indicates if Video4Linux2 codec is used. This is used for all CrOS
+  # platforms which have v4l2 hardware encoder / decoder.
+  use_v4l2_codec = false
+}