cros: Clear out LoginDisplayHostImpl::login_view_ before login_window_.

chrome/browser/chromeos/login/ui/login_display_host_impl.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_CHROMEOS_LOGIN_UI_LOGIN_DISPLAY_HOST_IMPL_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOGIN_DISPLAY_HOST_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 211 matching lines @@
 
   // ARC kiosk controller.
   std::unique_ptr<ArcKioskController> arc_kiosk_controller_;
 
   // Make sure chrome won't exit while we are at login/oobe screen.
   std::unique_ptr<ScopedKeepAlive> keep_alive_;
 
   // Has ShutdownDisplayHost() already been called?  Used to avoid posting our
   // own deletion to the message loop twice if the user logs out while we're
   // still in the process of cleaning up after login (http://crbug.com/134463).
-  bool shutting_down_;
+  bool shutting_down_ = false;
 
   // Whether progress bar is shown on the OOBE page.
-  bool oobe_progress_bar_visible_;
+  bool oobe_progress_bar_visible_ = false;
 
   // True if session start is in progress.
-  bool session_starting_;
+  bool session_starting_ = false;
 
   // Container of the screen we are displaying.
-  views::Widget* login_window_;
+  views::Widget* login_window_ = nullptr;
 
   // Container of the view we are displaying.
-  WebUILoginView* login_view_;
+  WebUILoginView* login_view_ = nullptr;
 
   // Login display we are using.
-  WebUILoginDisplay* webui_login_display_;
+  WebUILoginDisplay* webui_login_display_ = nullptr;
 
   // True if the login display is the current screen.
-  bool is_showing_login_;
+  bool is_showing_login_ = false;
 
   // True if NOTIFICATION_WALLPAPER_ANIMATION_FINISHED notification has been
   // received.
-  bool is_wallpaper_loaded_;
+  bool is_wallpaper_loaded_ = false;
 
   // Stores status area current visibility to be applied once login WebUI
   // is shown.
-  bool status_area_saved_visibility_;
+  bool status_area_saved_visibility_ = false;
 
   // If true, WebUI is initialized in a hidden state and shown after the
   // wallpaper animation is finished (when it is enabled) or the user pods have
   // been loaded (otherwise).
   // By default is true. Could be used to tune performance if needed.
   bool initialize_webui_hidden_;
 
   // True if WebUI is initialized in hidden state and we're waiting for
   // wallpaper load animation to finish.
   bool waiting_for_wallpaper_load_;
 
   // True if WebUI is initialized in hidden state and we're waiting for user
   // pods to load.
   bool waiting_for_user_pods_;
 
   // How many times renderer has crashed.
-  int crash_count_;
+  int crash_count_ = 0;
 
   // Way to restore if renderer have crashed.
-  RestorePath restore_path_;
+  RestorePath restore_path_ = RESTORE_UNKNOWN;
 
   // Stored parameters for StartWizard, required to restore in case of crash.
   OobeScreen first_screen_;
 
   // Called before host deletion.
   base::Closure completion_callback_;
 
   // Active instance of authentication prewarmer.
   std::unique_ptr<AuthPrewarmer> auth_prewarmer_;
 
   // A focus ring controller to draw focus ring around view for keyboard
   // driven oobe.
   std::unique_ptr<FocusRingController> focus_ring_controller_;
 
   // Handles special keys for keyboard driven oobe.
   std::unique_ptr<KeyboardDrivenOobeKeyHandler>
       keyboard_driven_oobe_key_handler_;
 
-  FinalizeAnimationType finalize_animation_type_;
+  FinalizeAnimationType finalize_animation_type_ = ANIMATION_WORKSPACE;
 
   // Time when login prompt visible signal is received. Used for
   // calculations of delay before startup sound.
   base::TimeTicks login_prompt_visible_time_;
 
   // True when request to play startup sound was sent to
   // SoundsManager.
-  bool startup_sound_played_;
+  bool startup_sound_played_ = false;
 
   // When true, startup sound should be played only when spoken
   // feedback is enabled.  Otherwise, startup sound should be played
   // in any case.
-  bool startup_sound_honors_spoken_feedback_;
+  bool startup_sound_honors_spoken_feedback_ = false;
 
   // True is subscribed as keyboard controller observer.
-  bool is_observing_keyboard_;
+  bool is_observing_keyboard_ = false;
 
   // Keeps a copy of the old Drag'n'Drop client, so that it would be disabled
   // during a login session and restored afterwards.
   std::unique_ptr<aura::client::ScopedDragDropDisabler>
       scoped_drag_drop_disabler_;
 
   base::WeakPtrFactory<LoginDisplayHostImpl> pointer_factory_;
   base::WeakPtrFactory<LoginDisplayHostImpl> animation_weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LoginDisplayHostImpl);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOGIN_DISPLAY_HOST_IMPL_H_