cros: Remove unused method

chrome/browser/ui/webui/chromeos/login/enable_debugging_screen_handler.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/ui/webui/chromeos/login/enable_debugging_screen_handler.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/values.h"
@@ skipping 28 matching lines @@
       delegate_(NULL),
       show_on_init_(false),
       weak_ptr_factory_(this) {
 }
 
 EnableDebuggingScreenHandler::~EnableDebuggingScreenHandler() {
   if (delegate_)
     delegate_->OnActorDestroyed(this);
 }
 
-void EnableDebuggingScreenHandler::PrepareToShow() {
-}
-
 void EnableDebuggingScreenHandler::ShowWithParams() {
   ShowScreen(OobeScreen::SCREEN_OOBE_ENABLE_DEBUGGING);
 
   UpdateUIState(UI_STATE_WAIT);
 
   DVLOG(1) << "Showing enable debugging screen.";
 
   // Wait for cryptohomed before checking debugd. See http://crbug.com/440506.
   chromeos::CryptohomeClient* client =
       chromeos::DBusThreadManager::Get()->GetCryptohomeClient();
@@ skipping 225 matching lines @@
   LoginWebDialog* dialog = new LoginWebDialog(
       Profile::FromWebUI(web_ui()),
       NULL,
       GetNativeWindow(),
       base::string16(),
       data_url);
   dialog->Show();
 }
 
 }  // namespace chromeos