cros: Remove unused WizardController::Observer.

chrome/browser/chromeos/login/ui/login_display_host_impl.cc

 // 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.
 
 #include "chrome/browser/chromeos/login/ui/login_display_host_impl.h"
 
 #include <utility>
 #include <vector>
 
 #include "ash/common/wallpaper/wallpaper_controller.h"
@@ skipping 521 matching lines @@
 
 void LoginDisplayHostImpl::Finalize() {
   DVLOG(1) << "Session starting";
   // When adding another user into the session, we defer the wallpaper's
   // animation in order to prevent the flashing of the previous user's windows.
   // See crbug.com/541864.
   if (ash::WmShell::HasInstance() &&
       finalize_animation_type_ != ANIMATION_ADD_USER) {
     ash::WmShell::Get()->wallpaper_controller()->MoveToUnlockedContainer();
   }
-  if (wizard_controller_.get())
-    wizard_controller_->OnSessionStart();
 
   switch (finalize_animation_type_) {
     case ANIMATION_NONE:
       ShutdownDisplayHost(false);
       break;
     case ANIMATION_WORKSPACE:
       if (ash::Shell::HasInstance())
         ScheduleWorkspaceAnimation();
 
       ShutdownDisplayHost(false);
@@ skipping 906 matching lines @@
   // Chrome locale. Otherwise it will be lost if Chrome restarts.
   // Don't need to schedule pref save because setting initial local
   // will enforce preference saving.
   prefs->SetString(prefs::kApplicationLocale, locale);
   StartupUtils::SetInitialLocale(locale);
 
   TriggerShowLoginWizardFinish(locale, std::move(data));
 }
 
 }  // namespace chromeos