Create OOBE screen for Voice Interaction value proposition

chrome/browser/chromeos/login/screens/voice_interaction_value_prop_screen_view.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_CHROMEOS_LOGIN_SCREENS_VOICE_INTERACTION_VALUE_PROP_SCREEN_VIEW_H_
+#define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_VOICE_INTERACTION_VALUE_PROP_SCREEN_VIEW_H_
+
+#include "chrome/browser/chromeos/login/oobe_screen.h"
+
+namespace chromeos {
+
+class VoiceInteractionValuePropScreen;
+
+// Interface for dependency injection between VoiceInteractionValuePropScreen
+// and its WebUI representation.
+class VoiceInteractionValuePropScreenView {
+ public:
+  constexpr static OobeScreen kScreenId =
+      OobeScreen::SCREEN_VOICE_INTERACTION_VALUE_PROP;
+
+  virtual ~VoiceInteractionValuePropScreenView() {}
+
+  virtual void Bind(VoiceInteractionValuePropScreen* screen) = 0;
+  virtual void Unbind() = 0;
+  virtual void Show() = 0;
+  virtual void Hide() = 0;
+
+ protected:
+  VoiceInteractionValuePropScreenView() = default;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(VoiceInteractionValuePropScreenView);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_VOICE_INTERACTION_VALUE_PROP_SCREEN_VIEW_H_