Hook up insecure content warnings for http webVR presentation.

chrome/browser/android/vr_shell/ui_elements/transient_security_warning.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/transient_security_warning.h"
+
+#include "base/memory/ptr_util.h"
+#include "chrome/browser/android/vr_shell/textures/insecure_content_transient_texture.h"
+
+namespace vr_shell {
+
+TransientSecurityWarning::TransientSecurityWarning(int preferred_width)
+    : TexturedElement(preferred_width),
+      texture_(base::MakeUnique<InsecureContentTransientTexture>()) {}
+
+TransientSecurityWarning::~TransientSecurityWarning() = default;
+
+UiTexture* TransientSecurityWarning::GetTexture() const {
+  return texture_.get();
+}
+
+}  // namespace vr_shell