[vr] Bail on unhandled code points.

chrome/browser/android/vr_shell/ui_elements/url_bar.h

 // 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.
 
 #ifndef CHROME_BROWSER_ANDROID_VR_SHELL_UI_ELEMENTS_URL_BAR_H_
 #define CHROME_BROWSER_ANDROID_VR_SHELL_UI_ELEMENTS_URL_BAR_H_
 
 #include <memory>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/time/time.h"
 #include "chrome/browser/android/vr_shell/ui_elements/textured_element.h"
+#include "chrome/browser/android/vr_shell/ui_unsupported_mode.h"
 #include "url/gurl.h"
 
 namespace vr_shell {
 
 class UrlBarTexture;
 
 class UrlBar : public TexturedElement {
  public:
-  explicit UrlBar(int preferred_width);
+  UrlBar(int preferred_width,
+         const base::Callback<void(UiUnsupportedMode)>& failure_callback);
   ~UrlBar() override;
 
   void OnHoverEnter(const gfx::PointF& position) override;
   void OnHoverLeave() override;
   void OnMove(const gfx::PointF& position) override;
   void OnButtonDown(const gfx::PointF& position) override;
   void OnButtonUp(const gfx::PointF& position) override;
   bool HitTest(const gfx::PointF& point) const override;
 
   void OnBeginFrame(const base::TimeTicks& begin_frame_time) override;
@@ skipping 14 matching lines @@
   bool down_ = false;
   base::TimeTicks last_begin_frame_time_;
   base::TimeTicks last_update_time_;
 
   DISALLOW_COPY_AND_ASSIGN(UrlBar);
 };
 
 }  // namespace vr_shell
 
 #endif  // CHROME_BROWSER_ANDROID_VR_SHELL_UI_ELEMENTS_URL_BAR_H_