Ports VRService to be hosted in the device service.

services/device/BUILD.gn

Index: services/device/BUILD.gn
diff --git a/services/device/BUILD.gn b/services/device/BUILD.gn
index 32f49224b22bb2793614e59ad8f07b5b930f8098..765a84bde0118c2eb39af6818f221de20f661abb 100644
--- a/services/device/BUILD.gn
+++ b/services/device/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("//services/service_manager/public/cpp/service.gni")
 import("//services/service_manager/public/service_manifest.gni")
 
@@ -16,6 +17,12 @@ source_set("lib") {
     "//device/time_zone_monitor",
     "//services/service_manager/public/cpp",
   ]
+  if (enable_webvr) {
+    deps += [
+      "//device/vr",
+      "//device/vr:mojo_bindings",
+    ]
+  }
 
   public_deps = [
     # TODO(blundell): This dep shouldn't be necessary at all,