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 5f97776282041bc2dd710092a21cf79dcd5b265f..0408af20536f73e3962471e7e06e5e964ed5a2b7 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();
@@ -49,6 +50,7 @@ class UiSceneManager {
   void CreateBackground();
   void CreateUrlBar();
 
+  void ConfigureScene();
   void ConfigureSecurityWarnings();
   void OnSecurityWarningTimer();
   void OnBackButtonClicked();
@@ -62,6 +64,7 @@ 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_;