cros: Remove unused WizardController::Observer.

chrome/browser/chromeos/login/wizard_controller.h

 // Copyright (c) 2012 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_WIZARD_CONTROLLER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_WIZARD_CONTROLLER_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 40 matching lines @@
 // Class that manages control flow between wizard screens. Wizard controller
 // interacts with screen controllers to move the user between screens.
 class WizardController : public BaseScreenDelegate,
                          public ScreenManager,
                          public EulaScreen::Delegate,
                          public ControllerPairingScreen::Delegate,
                          public HostPairingScreen::Delegate,
                          public NetworkScreen::Delegate,
                          public HIDDetectionScreen::Delegate {
  public:
-  // Observes screen changes.
-  class Observer {
-   public:
-    // Called before a screen change happens.
-    virtual void OnScreenChanged(BaseScreen* next_screen) = 0;
-
-    // Called after the browser session has started.
-    virtual void OnSessionStart() = 0;
-  };
-
   WizardController(LoginDisplayHost* host, OobeUI* oobe_ui);
   ~WizardController() override;
 
   // Returns the default wizard controller if it has been created.
   static WizardController* default_controller() {
     return default_controller_;
   }
 
   // Whether to skip any screens that may normally be shown after login
   // (registration, Terms of Service, user image selection).
@@ skipping 21 matching lines @@
   // Advances to screen defined by |screen| and shows it.
   void AdvanceToScreen(OobeScreen screen);
 
   // Advances to login screen. Should be used in for testing only.
   void SkipToLoginForTesting(const LoginScreenContext& context);
 
   // Should be used for testing only.
   pairing_chromeos::SharkConnectionListener*
   GetSharkConnectionListenerForTesting();
 
-  // Adds and removes an observer.
-  void AddObserver(Observer* observer);
-  void RemoveObserver(Observer* observer);
-
-  // Called right after the browser session has started.
-  void OnSessionStart();
-
   // Skip update, go straight to enrollment after EULA is accepted.
   void SkipUpdateEnrollAfterEula();
 
   // TODO(antrim) : temporary hack. Should be removed once screen system is
   // reworked at hackaton.
   void EnableUserImageScreenReturnToPreviousHack();
 
   // Returns a pointer to the current screen or nullptr if there's no such
   // screen.
   BaseScreen* current_screen() const { return current_screen_; }
@@ skipping 238 matching lines @@
   bool retry_auto_enrollment_check_ = false;
 
   // Time when the EULA was accepted. Used to measure the duration from the EULA
   // acceptance until the Sign-In screen is displayed.
   base::Time time_eula_accepted_;
 
   // Time when OOBE was started. Used to measure the total time from boot to
   // user Sign-In completed.
   base::Time time_oobe_started_;
 
-  base::ObserverList<Observer> observer_list_;
-
   // Whether OOBE has yet been marked as completed.
   bool oobe_marked_completed_ = false;
 
   bool login_screen_started_ = false;
 
   // Indicates that once image selection screen finishes we should return to
   // a previous screen instead of proceeding with usual flow.
   bool user_image_screen_return_to_previous_hack_ = false;
 
   // Non-owning pointer to local state used for testing.
@@ skipping 34 matching lines @@
   BaseScreen* hid_screen_ = nullptr;
 
   base::WeakPtrFactory<WizardController> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WizardController);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_WIZARD_CONTROLLER_H_