[vr] Bail on unhandled code points.

chrome/browser/android/vr_shell/textures/url_bar_texture.h

Index: chrome/browser/android/vr_shell/textures/url_bar_texture.h
diff --git a/chrome/browser/android/vr_shell/textures/url_bar_texture.h b/chrome/browser/android/vr_shell/textures/url_bar_texture.h
index c6ebf975f196f75fa63d6693d17f01f197c58518..0d55f6156768f909e3748747226e8fb5a3784e6e 100644
--- a/chrome/browser/android/vr_shell/textures/url_bar_texture.h
+++ b/chrome/browser/android/vr_shell/textures/url_bar_texture.h
@@ -8,8 +8,10 @@
 #include <memory>
 #include <vector>
 
+#include "base/callback.h"
 #include "base/macros.h"
 #include "chrome/browser/android/vr_shell/textures/ui_texture.h"
+#include "chrome/browser/android/vr_shell/ui_unsupported_mode.h"
 #include "url/gurl.h"
 
 namespace gfx {
@@ -26,7 +28,8 @@ class UrlBarTexture : public UiTexture {
     FLAG_BACK_DOWN = 1 << 1,
   };
 
-  UrlBarTexture();
+  explicit UrlBarTexture(
+      const base::Callback<void(UiUnsupportedMode)>& failure_callback);
   ~UrlBarTexture() override;
   gfx::Size GetPreferredTextureSize(int width) const override;
   gfx::SizeF GetDrawnSize() const override;
@@ -52,6 +55,7 @@ class UrlBarTexture : public UiTexture {
   GURL gurl_;
   GURL last_drawn_gurl_;
   std::vector<std::unique_ptr<gfx::RenderText>> gurl_render_texts_;
+  base::Callback<void(UiUnsupportedMode)> failure_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(UrlBarTexture);
 };