cros: Remove unused method

chrome/browser/ui/webui/chromeos/login/hid_detection_screen_handler.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/ui/webui/chromeos/login/hid_detection_screen_handler.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/macros.h"
@@ skipping 53 matching lines @@
   BaseScreenHandler::SetBaseScreen(model_);
   if (page_is_ready())
     Initialize();
 }
 
 void HIDDetectionScreenHandler::Unbind() {
   model_ = nullptr;
   BaseScreenHandler::SetBaseScreen(nullptr);
 }
 
-void HIDDetectionScreenHandler::PrepareToShow() {
-}
-
 void HIDDetectionScreenHandler::CheckIsScreenRequired(
       const base::Callback<void(bool)>& on_check_done) {
   model_->CheckIsScreenRequired(on_check_done);
 }
 
 void HIDDetectionScreenHandler::DeclareLocalizedValues(
     ::login::LocalizedValuesBuilder* builder) {
   builder->Add("hidDetectionContinue", IDS_HID_DETECTION_CONTINUE_BUTTON);
   builder->Add("hidDetectionInvitation", IDS_HID_DETECTION_INVITATION_TEXT);
   builder->Add("hidDetectionPrerequisites",
@@ skipping 30 matching lines @@
   if (model_)
     model_->OnContinueButtonClicked();
 }
 
 // static
 void HIDDetectionScreenHandler::RegisterPrefs(PrefRegistrySimple* registry) {
   registry->RegisterIntegerPref(prefs::kTimesHIDDialogShown, 0);
 }
 
 }  // namespace chromeos