VR: Add a loading indicator to the scene.

chrome/browser/android/vr_shell/ui_scene_manager.h

Index: chrome/browser/android/vr_shell/ui_scene_manager.h
diff --git a/chrome/browser/android/vr_shell/ui_scene_manager.h b/chrome/browser/android/vr_shell/ui_scene_manager.h
index 3d54ad7371eb04f14a2c0cd9281deb65bddca699..81e7f5e56a7ca1d7359ae320de47557ede3ff634 100644
--- a/chrome/browser/android/vr_shell/ui_scene_manager.h
+++ b/chrome/browser/android/vr_shell/ui_scene_manager.h
@@ -15,6 +15,7 @@ class GURL;
 
 namespace vr_shell {
 
+class LoadingIndicator;
 class UiElement;
 class UiScene;
 class UrlBar;
@@ -37,7 +38,7 @@ class UiSceneManager {
   // These methods are currently stubbed.
   void SetSecurityLevel(int level);
   void SetLoading(bool loading);
-  void SetLoadProgress(double progress);
+  void SetLoadProgress(float progress);
   void SetHistoryButtonsEnabled(bool can_go_back, bool can_go_forward);
 
   void OnAppButtonClicked();
@@ -50,6 +51,7 @@ class UiSceneManager {
   void CreateUrlBar();
   void CreateCloseButton();
 
+  void ConfigureScene();
   void ConfigureSecurityWarnings();
   void OnSecurityWarningTimer();
   void OnBackButtonClicked();
@@ -64,14 +66,17 @@ class UiSceneManager {
   UiElement* transient_security_warning_ = nullptr;
   UiElement* main_content_ = nullptr;
   UrlBar* url_bar_ = nullptr;
+  LoadingIndicator* loading_indicator_ = nullptr;
 
   bool in_cct_;
   bool web_vr_mode_;
   bool secure_origin_ = false;
+  bool fullscreen_ = false;
 
   int next_available_id_ = 1;
 
-  std::vector<UiElement*> browser_ui_elements_;
+  std::vector<UiElement*> content_elements_;
+  std::vector<UiElement*> control_elements_;
 
   base::OneShotTimer security_warning_timer_;