Move vr features.gni into its own directory.

device/vr/features.gni

Index: device/vr/features.gni
diff --git a/device/vr/features.gni b/device/vr/features.gni
deleted file mode 100644
index cc619fcbb1d9fecef28852677f3370880cc558ff..0000000000000000000000000000000000000000
--- a/device/vr/features.gni
+++ /dev/null
@@ -1,12 +0,0 @@
-# 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() {
-  # Enable WebVR support by default on Android
-  # Still requires command line flag to access API
-  # TODO(bshe): Enable for other architecture too. Currently we only support arm
-  # and arm64.
-  enable_vr = is_android && (current_cpu == "arm" || current_cpu == "arm64")
-  enable_openvr = false
-}