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 d6c468dc3dae1778012e5c7c6e8b8ec61d1e023a..ec5bd51f3b1f9776318528bf00e3062cfd1156b3 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")
 
@@ -18,6 +19,12 @@ source_set("lib") {
     "//services/service_manager/public/cpp",
   ]
 
+  if (enable_webvr) {
+    deps += [ "//device/vr" ]
+  } else {
+    deps += [ "//device/vr:mojo_bindings" ]
+  }
+
   public_deps = [
     # TODO(blundell): This dep shouldn't be necessary at all,
     # but content_shell fails to link in the component build if