VR: Fix HTTP warning staying visible after exiting WebVR.

chrome/browser/android/vr_shell/ui_scene.h

Index: chrome/browser/android/vr_shell/ui_scene.h
diff --git a/chrome/browser/android/vr_shell/ui_scene.h b/chrome/browser/android/vr_shell/ui_scene.h
index 712f0e9ddc6125ea2b162c9488ff44846e4f4c46..b78b24ac73a67c995e5191700d7747c5320a8dbd 100644
--- a/chrome/browser/android/vr_shell/ui_scene.h
+++ b/chrome/browser/android/vr_shell/ui_scene.h
@@ -10,6 +10,7 @@
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
+#include "chrome/browser/android/vr_shell/ui_elements/ui_element_identifiers.h"
 #include "device/vr/vr_types.h"
 
 namespace base {
@@ -57,7 +58,8 @@ class UiScene {
 
   const std::vector<std::unique_ptr<UiElement>>& GetUiElements() const;
 
-  UiElement* GetUiElementById(int element_id);
+  UiElement* GetUiElementById(int element_id) const;
+  UiElement* GetUiElementByIdentifier(UiElementIdentifier identifier) const;
 
   std::vector<const UiElement*> GetWorldElements() const;
   std::vector<const UiElement*> GetHeadLockedElements() const;