[vr] Bail on unhandled code points.

chrome/browser/android/vr_shell/ui_scene_manager.cc

 // Copyright 2017 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.
 
 #include "chrome/browser/android/vr_shell/ui_scene_manager.h"
 
 #include "base/callback.h"
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/android/vr_shell/color_scheme.h"
 #include "chrome/browser/android/vr_shell/textures/close_button_texture.h"
@@ skipping 253 matching lines @@
   element->set_draw_phase(0);
   floor_grid_ = element.get();
   content_elements_.push_back(element.get());
   scene_->AddUiElement(std::move(element));
 
   UpdateBackgroundColor();
 }
 
 void UiSceneManager::CreateUrlBar() {
   // TODO(cjgrant): Incorporate final size and position.
-  auto url_bar = base::MakeUnique<UrlBar>(512);
+  auto url_bar = base::MakeUnique<UrlBar>(
+      512,
+      base::Bind(&UiSceneManager::OnUnsupportedMode, base::Unretained(this)));
   url_bar->set_debug_id(kUrlBar);
   url_bar->set_id(AllocateId());
   url_bar->set_translation({0, kUrlBarVerticalOffset, -kUrlBarDistance});
   url_bar->set_size({kUrlBarWidth, kUrlBarHeight, 1});
   url_bar->SetBackButtonCallback(
       base::Bind(&UiSceneManager::OnBackButtonClicked, base::Unretained(this)));
   url_bar_ = url_bar.get();
   control_elements_.push_back(url_bar.get());
   scene_->AddUiElement(std::move(url_bar));
 
@@ skipping 164 matching lines @@
   ConfigureScene();
 }
 
 void UiSceneManager::SetHistoryButtonsEnabled(bool can_go_back,
                                               bool can_go_forward) {}
 
 void UiSceneManager::OnCloseButtonClicked() {
   browser_->ExitCct();
 }
 
+void UiSceneManager::OnUnsupportedMode(UiUnsupportedMode mode) {
+  browser_->OnUnsupportedMode(mode);
+}
+
 int UiSceneManager::AllocateId() {
   return next_available_id_++;
 }
 
 const ColorScheme& UiSceneManager::color_scheme() const {
   return ColorScheme::GetColorScheme(fullscreen_ ? ColorScheme::kModeFullscreen
                                                  : ColorScheme::kModeNormal);
 }
 
 }  // namespace vr_shell