VR: Add a loading indicator to the scene.

chrome/browser/android/vr_shell/ui_elements/url_bar.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/url_bar.h"
 
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/android/vr_shell/textures/url_bar_texture.h"
 
 namespace vr_shell {
@@ skipping 43 matching lines @@
   last_begin_frame_time_ = begin_frame_time;
   if (enabled_ && texture_->dirty()) {
     int64_t delta_ms = (begin_frame_time - last_update_time_).InMilliseconds();
     if (delta_ms > kUpdateDelayMS)
       UpdateTexture();
   }
 }
 
 void UrlBar::SetEnabled(bool enabled) {
   enabled_ = enabled;
+  set_visible(enabled);
 }
 
 void UrlBar::SetURL(const GURL& gurl) {
   texture_->SetURL(gurl);
 }
 
 void UrlBar::SetSecurityLevel(int level) {
   texture_->SetSecurityLevel(level);
 }
 
 void UrlBar::SetBackButtonCallback(const base::Callback<void()>& callback) {
   back_button_callback_ = callback;
 }
 
 }  // namespace vr_shell