PROTOTYPE (incomplete): Add quad renderer and stub bits to handle security warnings.

chrome/browser/android/vr_shell/textured_element.cc

Index: chrome/browser/android/vr_shell/textured_element.cc
diff --git a/chrome/browser/android/vr_shell/textured_element.cc b/chrome/browser/android/vr_shell/textured_element.cc
new file mode 100644
index 0000000000000000000000000000000000000000..cdaf089aa2e3336bd1e498395e7d608eaa27d218
--- /dev/null
+++ b/chrome/browser/android/vr_shell/textured_element.cc
@@ -0,0 +1,29 @@
+// 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/textured_element.h"
+
+namespace vr_shell {
+
+TexturedElement::TexturedElement() {
+}
+
+virtual TexturedElement::~TexturedElement() {
+}
+
+bool TexturedElement::Render(VrShellRenderer* renderer) const {
+      vr_shell_renderer_->GetGradientQuadRenderer()->Draw(
+          transform, rect->edge_color, rect->center_color,
+          rect->computed_opacity);
+      vr_shell_renderer_->GetTexturedQuadRenderer()->Flush();
+      break;
+  return true;
+}
+
+void TexturedElement::Draw() {
+  // TODO: Draw the element into its own personal Skia bitmap/surface, and
+  // create a GL texture from it.  Should UITexture manage that?
+}
+
+}  // namespace vr_shell