[vr] Clicking on the security icon should prompt the user to bail out of VR

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>
 
@@ skipping 62 matching lines @@
   SkColor GetWorldBackgroundColor() const;
 
   void SetBackgroundDistance(float distance);
   float GetBackgroundDistance() const;
 
   bool GetWebVrRenderingEnabled() const;
   void SetWebVrRenderingEnabled(bool enabled);
 
   bool is_exiting() const { return is_exiting_; }
   void set_is_exiting();
+  bool is_prompting_to_exit() { return is_prompting_to_exit_; }
+  void set_is_prompting_to_exit(bool prompting);
 
   void OnGLInitialized();
 
  private:
   void Animate(const base::TimeTicks& current_time);
   void ApplyRecursiveTransforms(UiElement* element);
 
   std::vector<std::unique_ptr<UiElement>> ui_elements_;
   UiElement* content_element_ = nullptr;
   ColorScheme::Mode mode_ = ColorScheme::kModeNormal;
 
   float background_distance_ = 10.0f;
   bool webvr_rendering_enabled_ = true;
   bool gl_initialized_ = false;
   bool is_exiting_ = false;
+  bool is_prompting_to_exit_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(UiScene);
 };
 
 }  // namespace vr_shell
 
 #endif  // CHROME_BROWSER_ANDROID_VR_SHELL_UI_SCENE_H_