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

chrome/browser/android/vr_shell/ui_elements/exit_prompt.h

+// Copyright 2017 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_ELEMENTS_EXIT_PROMPT_H_
+#define CHROME_BROWSER_ANDROID_VR_SHELL_UI_ELEMENTS_EXIT_PROMPT_H_
+
+#include <memory>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "chrome/browser/android/vr_shell/ui_elements/textured_element.h"
+
+namespace vr_shell {
+
+class ExitPromptTexture;
+
+class ExitPrompt : public TexturedElement {
+ public:
+  ExitPrompt(int preferred_width,
+             const base::Callback<void()>& primary_button_callback,
+             const base::Callback<void()>& secondary_buttton_callback);
+  ~ExitPrompt() override;
+
+  void SetTextureForTesting(ExitPromptTexture* texture);
+
+  void OnHoverEnter(const gfx::PointF& position) override;
+  void OnHoverLeave() override;
+  void OnMove(const gfx::PointF& position) override;
+  void OnButtonDown(const gfx::PointF& position) override;
+  void OnButtonUp(const gfx::PointF& position) override;
+
+ private:
+  UiTexture* GetTexture() const override;
+
+  // TODO(ymalik): Should this move into a parent class?

[cjgrant, 2017/06/05 17:33:53]

Can we drop the todo?  Should either be a bug filed to refactor (with no need to
mention it here), or just assume future refactoring will happen if needed, IMO.

[ymalik, 2017/06/05 20:02:42]

Done.

+  void OnStateUpdated(const gfx::PointF& position);
+
+  bool primary_down_ = false;
+  bool secondary_down_ = false;
+
+  std::unique_ptr<ExitPromptTexture> texture_;
+
+  base::Callback<void()> primary_button_callback_;
+  base::Callback<void()> secondary_buttton_callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(ExitPrompt);
+};
+
+}  // namespace vr_shell
+
+#endif  // CHROME_BROWSER_ANDROID_VR_SHELL_UI_ELEMENTS_EXIT_PROMPT_H_