VR: System indicator rework.

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 e6e1564ced1c8bd04f6ed2d580530d73a50e7098..11d6f274999d9b4858133ae8d956343515776389 100644
--- a/chrome/browser/android/vr_shell/ui_scene_manager.h
+++ b/chrome/browser/android/vr_shell/ui_scene_manager.h
@@ -51,6 +51,7 @@ class UiSceneManager {
   // These methods are currently stubbed.
   void SetHistoryButtonsEnabled(bool can_go_back, bool can_go_forward);
 
+  void OnGLInitialized();
   void OnAppButtonClicked();
   void OnAppButtonGesturePerformed(UiInterface::Direction direction);
 
@@ -109,6 +110,8 @@ class UiSceneManager {
   TransientUrlBar* transient_url_bar_ = nullptr;
   LoadingIndicator* loading_indicator_ = nullptr;
 
+  std::vector<UiElement*> system_indicators_;
+
   bool in_cct_;
   bool web_vr_mode_;
   bool web_vr_autopresented_ = false;