cros: Remove unused method

chrome/browser/chromeos/login/screens/reset_screen.cc

 // Copyright (c) 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/screens/reset_screen.h"
 
 #include "base/command_line.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 31 matching lines @@
   context_.SetBoolean(kContextKeyIsOfficialBuild, true);
 #endif
 }
 
 ResetScreen::~ResetScreen() {
   if (view_)
     view_->Unbind();
   DBusThreadManager::Get()->GetUpdateEngineClient()->RemoveObserver(this);
 }
 
-void ResetScreen::PrepareToShow() {
-  if (view_)
-    view_->PrepareToShow();
-}
-
 void ResetScreen::Show() {
   if (view_)
     view_->Show();
 
   int dialog_type = -1;  // used by UMA metrics.
 
   ContextEditor context_editor = GetContextEditor();
 
   bool restart_required = !base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kFirstExecAfterBoot);
@@ skipping 176 matching lines @@
                             reset::DIALOG_VIEW_TYPE_SIZE);
 
   GetContextEditor().SetBoolean(kContextKeyIsRollbackAvailable, can_rollback);
 }
 
 ErrorScreen* ResetScreen::GetErrorScreen() {
   return get_base_screen_delegate()->GetErrorScreen();
 }
 
 }  // namespace chromeos