cros: Fold HIDDetectionModel into HIDDetectionScreen.

chrome/browser/ui/webui/chromeos/login/hid_detection_screen_handler.h

 // Copyright 2014 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_UI_WEBUI_CHROMEOS_LOGIN_HID_DETECTION_SCREEN_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_HID_DETECTION_SCREEN_HANDLER_H_
 
 #include <memory>
 
 #include "base/compiler_specific.h"
@@ skipping 13 matching lines @@
     : public HIDDetectionView,
       public BaseScreenHandler {
  public:
 
   explicit HIDDetectionScreenHandler(CoreOobeActor* core_oobe_actor);
   ~HIDDetectionScreenHandler() override;
 
   // HIDDetectionView implementation:
   void Show() override;
   void Hide() override;
-  void Bind(HIDDetectionModel& model) override;
+  void Bind(HIDDetectionScreen* screen) override;
   void Unbind() override;
   void CheckIsScreenRequired(
       const base::Callback<void(bool)>& on_check_done) override;
 
   // BaseScreenHandler implementation:
   void DeclareLocalizedValues(
       ::login::LocalizedValuesBuilder* builder) override;
   void DeclareJSCallbacks() override;
   void Initialize() override;
 
   // Registers the preference for derelict state.
   static void RegisterPrefs(PrefRegistrySimple* registry);
 
  private:
   // JS messages handlers.
   void HandleOnContinue();
 
-  HIDDetectionModel* model_;
+  HIDDetectionScreen* screen_ = nullptr;
 
-  CoreOobeActor* core_oobe_actor_;
+  CoreOobeActor* core_oobe_actor_ = nullptr;
 
-  // Keeps whether screen should be shown right after initialization.
-  bool show_on_init_;
+  // If true, Initialize() will call Show().
+  bool show_on_init_ = false;
 
   DISALLOW_COPY_AND_ASSIGN(HIDDetectionScreenHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_HID_DETECTION_SCREEN_HANDLER_H_