cros: Remove unused method

chrome/browser/chromeos/login/enrollment/enrollment_screen.cc

 // 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.
 
 #include "chrome/browser/chromeos/login/enrollment/enrollment_screen.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/command_line.h"
@@ skipping 123 matching lines @@
   enrollment_helper_->ClearAuth(base::Bind(&EnrollmentScreen::OnAuthCleared,
                                            weak_ptr_factory_.GetWeakPtr(),
                                            callback));
 }
 
 void EnrollmentScreen::OnAuthCleared(const base::Closure& callback) {
   enrollment_helper_ = nullptr;
   callback.Run();
 }
 
-void EnrollmentScreen::PrepareToShow() {
-  actor_->PrepareToShow();
-}
-
 void EnrollmentScreen::Show() {
   UMA(policy::kMetricEnrollmentTriggered);
   switch (current_auth_) {
     case AUTH_OAUTH:
       ShowInteractiveScreen();
       break;
     case AUTH_ATTESTATION:
       AuthenticateUsingAttestation();
       break;
     default:
@@ skipping 189 matching lines @@
 }
 
 void EnrollmentScreen::RecordEnrollmentErrorMetrics() {
   enrollment_failed_once_ = true;
   //  TODO(drcrash): Maybe create multiple metrics (http://crbug.com/640313)?
   if (elapsed_timer_)
     UMA_ENROLLMENT_TIME(kMetricEnrollmentTimeFailure, elapsed_timer_);
 }
 
 }  // namespace chromeos