[vr] Bail on unhandled code points.

chrome/browser/android/vr_shell/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/android/rules.gni")
 import("//chrome/common/features.gni")
 import("//device/vr/features/features.gni")
 import("//testing/test.gni")
 
 assert(enable_vr)
@@ skipping 68 matching lines @@
       "ui_elements/ui_element_debug_id.h",
       "ui_elements/url_bar.cc",
       "ui_elements/url_bar.h",
       "ui_elements/video_capture_indicator.cc",
       "ui_elements/video_capture_indicator.h",
       "ui_interface.h",
       "ui_scene.cc",
       "ui_scene.h",
       "ui_scene_manager.cc",
       "ui_scene_manager.h",
+      "ui_unsupported_mode.h",
       "vr_browser_interface.h",
       "vr_compositor.cc",
       "vr_compositor.h",
       "vr_controller.cc",
       "vr_controller.h",
       "vr_controller_model.cc",
       "vr_controller_model.h",
       "vr_gl_thread.cc",
       "vr_gl_thread.h",
       "vr_gl_util.cc",
@@ skipping 87 matching lines @@
   # See https://crbug.com/704305 for details.
   libs = [ "//third_party/gvr-android-sdk/libgvr_shim_static_${current_cpu}.a" ]
 
   data = [
     "test/data/sample_inline.gltf",
     "test/data/sample_external.gltf",
     "test/data/sample.bin",
     "test/data/sample.glb",
   ]
 }