[vr] Bail on unhandled code points.

chrome/browser/android/vr_shell/ui_elements/url_bar.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_elements/url_bar.h"
 
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/android/vr_shell/textures/url_bar_texture.h"
 
 namespace vr_shell {
 
 namespace {
 
 // We will often get spammed with many updates. We will also get security and
 // url updates out of sync. To address both these problems, we will hang onto
 // dirtyness for |kUpdateDelay| before updating our texture to reduce visual
 // churn.
 constexpr int64_t kUpdateDelayMS = 50;
 
 }  // namespace
 
-UrlBar::UrlBar(int preferred_width)
+UrlBar::UrlBar(int preferred_width,
+               const base::Callback<void(UiUnsupportedMode)>& failure_callback)
     : TexturedElement(preferred_width),
-      texture_(base::MakeUnique<UrlBarTexture>()) {}
+      texture_(base::MakeUnique<UrlBarTexture>(failure_callback)) {}
 
 UrlBar::~UrlBar() = default;
 
 void UrlBar::UpdateTexture() {
   TexturedElement::UpdateTexture();
   last_update_time_ = last_begin_frame_time_;
 }
 
 UiTexture* UrlBar::GetTexture() const {
   return texture_.get();
@@ skipping 58 matching lines @@
 void UrlBar::OnStateUpdated(const gfx::PointF& position) {
   const bool hovered = texture_->HitsBackButton(position);
   const bool pressed = hovered ? down_ : false;
 
   texture_->SetHovered(hovered);
   texture_->SetPressed(pressed);
   UpdateTexture();
 }
 
 }  // namespace vr_shell