VR: Render the current URL and security level on the URL bar.

chrome/browser/android/vr_shell/ui_scene_manager.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_scene_manager.h"
 
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/android/vr_shell/textures/ui_texture.h"
 #include "chrome/browser/android/vr_shell/ui_elements/permanent_security_warning.h"
 #include "chrome/browser/android/vr_shell/ui_elements/transient_security_warning.h"
@@ skipping 176 matching lines @@
   scene_->SetBackgroundColor(horizon);
 }
 
 void UiSceneManager::CreateUrlBar() {
   // TODO(cjgrant): Incorporate final size and position.
   // TODO(cjgrant): Add the loading progress indicator element.
   auto element = base::MakeUnique<UrlBar>(512);
   element->set_id(AllocateId());
   element->set_translation({0, -0.9, -1.8});
   element->set_size({0.9, 0, 1});
+  element->SetBackButtonCallback(
+      base::Bind(&UiSceneManager::OnBackButtonClicked, base::Unretained(this)));
   url_bar_ = element.get();
   browser_ui_elements_.push_back(element.get());
   scene_->AddUiElement(std::move(element));
 }
 
 base::WeakPtr<UiSceneManager> UiSceneManager::GetWeakPtr() {
   return weak_ptr_factory_.GetWeakPtr();
 }
 
 void UiSceneManager::SetWebVrMode(bool web_vr) {
   web_vr_mode_ = web_vr;
 
   // Make all VR scene UI elements visible if not in WebVR.
   for (UiElement* element : browser_ui_elements_) {
     element->set_visible(!web_vr_mode_);
   }
+  url_bar_->SetEnabled(!web_vr);
 
   ConfigureSecurityWarnings();
 }
 
 void UiSceneManager::SetWebVrSecureOrigin(bool secure) {
   secure_origin_ = secure;
   ConfigureSecurityWarnings();
 }
 
 void UiSceneManager::OnAppButtonClicked() {
@@ skipping 44 matching lines @@
         &UiSceneManager::OnSecurityWarningTimer);
   } else {
     security_warning_timer_.Stop();
   }
 }
 
 void UiSceneManager::OnSecurityWarningTimer() {
   transient_security_warning_->set_visible(false);
 }
 
+void UiSceneManager::OnBackButtonClicked() {
+  browser_->NavigateBack();
+}
+
 void UiSceneManager::SetURL(const GURL& gurl) {
   url_bar_->SetURL(gurl);
 }
 
-void UiSceneManager::SetSecurityLevel(int level) {}
+void UiSceneManager::SetSecurityLevel(int level) {
+  url_bar_->SetSecurityLevel(level);
+}
 
 void UiSceneManager::SetLoading(bool loading) {}
 
 void UiSceneManager::SetLoadProgress(double progress) {}
 
 void UiSceneManager::SetHistoryButtonsEnabled(bool can_go_back,
                                               bool can_go_forward) {}
 
 int UiSceneManager::AllocateId() {
   return next_available_id_++;
 }
 
 }  // namespace vr_shell