cros: Remove unused method

chrome/browser/chromeos/login/screens/hid_detection_screen.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/chromeos/login/screens/hid_detection_screen.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/metrics/histogram_macros.h"
@@ skipping 60 matching lines @@
   input_service_proxy_.RemoveObserver(this);
   if (view_)
     view_->Unbind();
   if (discovery_session_.get())
     discovery_session_->Stop(base::Bind(&base::DoNothing),
                              base::Bind(&base::DoNothing));
   if (adapter_.get())
     adapter_->RemoveObserver(this);
 }
 
-void HIDDetectionScreen::PrepareToShow() {
-  if (view_)
-    view_->PrepareToShow();
-}
-
 void HIDDetectionScreen::Show() {
   showing_ = true;
   GetContextEditor().SetBoolean(kContextKeyNumKeysEnteredExpected, false);
   SendPointingDeviceNotification();
   SendKeyboardDeviceNotification();
 
   input_service_proxy_.AddObserver(this);
   UpdateDevices();
 
   if (view_)
@@ skipping 448 matching lines @@
 void HIDDetectionScreen::SetPoweredOffError() {
   LOG(ERROR) << "Failed to power off BT adapter";
 }
 
 void HIDDetectionScreen::FindDevicesError() {
   VLOG(1) << "Failed to start Bluetooth discovery.";
 }
 
 
 }  // namespace chromeos