Mojo C++ bindings: switch device/vr mojom target to use STL/WTF types.

device/vr/BUILD.gn

 # 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.
 
 import("//build/config/features.gni")
 import("//mojo/public/tools/bindings/mojom.gni")
 
 if (is_android) {
   import("//build/config/android/rules.gni")  # For generate_jni().
 }
@@ skipping 58 matching lines @@
     ":vr",
     "//base",
     "//mojo/public/cpp/bindings",
   ]
 }
 
 mojom("mojo_bindings") {
   sources = [
     "vr_service.mojom",
   ]
-
-  use_new_wrapper_types = false
 }