VR: Fix HTTP warning staying visible after exiting WebVR.

chrome/browser/android/vr_shell/ui_scene.h

 // Copyright 2016 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.
 
 #ifndef CHROME_BROWSER_ANDROID_VR_SHELL_UI_SCENE_H_
 #define CHROME_BROWSER_ANDROID_VR_SHELL_UI_SCENE_H_
 
 #include <memory>
 #include <vector>
 
 #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 {
 class ListValue;
 class TimeTicks;
 }
 
 namespace vr_shell {
 
 class Animation;
@@ skipping 27 matching lines @@
   // if necessary (eg, for animations). NB: |current_time| is the shared,
   // absolute begin frame time.
   void OnBeginFrame(const base::TimeTicks& current_time);
 
   // Handle a batch of commands passed from the UI HTML.
   void HandleCommands(std::unique_ptr<base::ListValue> commands,
                       const base::TimeTicks& current_time);
 
   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;
   bool HasVisibleHeadLockedElements() const;
 
   void SetBackgroundColor(const vr::Colorf& color);
   const vr::Colorf& GetBackgroundColor() const;
   void SetBackgroundDistance(float distance);
   float GetBackgroundDistance() const;
 
@@ skipping 12 matching lines @@
   float background_distance_ = 10.0f;
   bool webvr_rendering_enabled_ = true;
   bool gl_initialized_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(UiScene);
 };
 
 }  // namespace vr_shell
 
 #endif  // CHROME_BROWSER_ANDROID_VR_SHELL_UI_SCENE_H_