cros: Remove unused method

chrome/browser/chromeos/login/screens/user_image_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/screens/user_image_screen.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 198 matching lines @@
           default_user_image::GetDefaultImageHistogramValue(selected_image_);
       break;
   }
   if (user_has_selected_image_) {
     UMA_HISTOGRAM_ENUMERATION("UserImage.FirstTimeChoice", uma_index,
                               default_user_image::kHistogramImagesCount);
   }
   ExitScreen();
 }
 
-
-void UserImageScreen::PrepareToShow() {
-  if (view_)
-    view_->PrepareToShow();
-}
-
 const user_manager::User* UserImageScreen::GetUser() {
   return user_manager::UserManager::Get()->GetActiveUser();
 }
 
 UserImageManager* UserImageScreen::GetUserImageManager() {
   return ChromeUserManager::Get()->GetUserImageManager(
       GetUser()->GetAccountId());
 }
 
 UserImageSyncObserver* UserImageScreen::GetSyncObserver() {
@@ skipping 119 matching lines @@
 
 void UserImageScreen::ReportSyncResult(SyncResult timed_out) const {
   base::TimeDelta duration = base::Time::Now() - sync_waiting_start_time_;
   UMA_HISTOGRAM_TIMES("Login.NewUserPriorityPrefsSyncTime", duration);
   UMA_HISTOGRAM_ENUMERATION("Login.NewUserPriorityPrefsSyncResult",
                             static_cast<int>(timed_out),
                             static_cast<int>(SyncResult::COUNT));
 }
 
 }  // namespace chromeos