[vr] Bail on unhandled code points.

chrome/browser/android/vr_shell/textures/url_bar_texture.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/textures/url_bar_texture.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "cc/paint/skia_paint_canvas.h"
 #include "chrome/browser/android/vr_shell/textures/render_text_wrapper.h"
 #include "components/url_formatter/url_formatter.h"
@@ skipping 84 matching lines @@
     render_text->SetColor(color);
   }
 }
 
 gfx::PointF percentToMeters(const gfx::PointF& percent) {
   return gfx::PointF(percent.x() * kWidth, percent.y() * kHeight);
 }
 
 }  // namespace
 
-UrlBarTexture::UrlBarTexture() : security_level_(SecurityLevel::DANGEROUS) {}
+UrlBarTexture::UrlBarTexture(
+    const base::Callback<void(UiUnsupportedMode)>& failure_callback)
+    : security_level_(SecurityLevel::DANGEROUS),
+      failure_callback_(failure_callback) {}
 
 UrlBarTexture::~UrlBarTexture() = default;
 
 void UrlBarTexture::SetURL(const GURL& gurl) {
   if (gurl_ != gurl)
     set_dirty();
   gurl_ = gurl;
 }
 
 void UrlBarTexture::SetSecurityLevel(SecurityLevel level) {
@@ skipping 119 matching lines @@
 }
 
 void UrlBarTexture::RenderUrl(const gfx::Size& texture_size,
                               const gfx::Rect& bounds) {
   url::Parsed parsed;
   const base::string16 text = url_formatter::FormatUrl(
       gurl_, url_formatter::kFormatUrlOmitAll, net::UnescapeRule::NORMAL,
       &parsed, nullptr, nullptr);
 
   int pixel_font_height = texture_size.height() * kFontHeight / kHeight;
-  auto font_list = GetFontList(pixel_font_height, text);
+
+  gfx::FontList font_list;
+  if (!GetFontList(pixel_font_height, text, &font_list))
+    failure_callback_.Run(UiUnsupportedMode::kUnhandledCodePoint);
 
   std::unique_ptr<gfx::RenderText> render_text(
       gfx::RenderText::CreateInstance());
   render_text->SetText(text);
   render_text->SetFontList(font_list);
   render_text->SetColor(SK_ColorBLACK);
   render_text->SetHorizontalAlignment(gfx::ALIGN_LEFT);
   render_text->SetDisplayRect(bounds);
   render_text->SetElideBehavior(gfx::TRUNCATE);
 
@@ skipping 69 matching lines @@
 
 gfx::Size UrlBarTexture::GetPreferredTextureSize(int maximum_width) const {
   return gfx::Size(maximum_width, maximum_width * kHeight / kWidth);
 }
 
 gfx::SizeF UrlBarTexture::GetDrawnSize() const {
   return size_;
 }
 
 }  // namespace vr_shell