cros: Break BaseScreenHandler into two classes.

chrome/browser/ui/webui/chromeos/login/device_disabled_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/device_disabled_screen_handler.h"
 
 #include "chrome/browser/chromeos/login/oobe_screen.h"
 #include "chrome/browser/ui/webui/chromeos/login/base_screen_handler.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/login/localized_values_builder.h"
 
 namespace {
 
 const char kJsScreenPath[] = "login.DeviceDisabledScreen";
 
 }  // namespace
 
 namespace chromeos {
 
-DeviceDisabledScreenHandler::DeviceDisabledScreenHandler() {
+DeviceDisabledScreenHandler::DeviceDisabledScreenHandler()
+    : BaseScreenHandler(kScreenId) {
   set_call_js_prefix(kJsScreenPath);
 }
 
 DeviceDisabledScreenHandler::~DeviceDisabledScreenHandler() {
   if (delegate_)
     delegate_->OnViewDestroyed(this);
 }
 
 void DeviceDisabledScreenHandler::Show() {
   if (!page_is_ready()) {
     show_on_init_ = true;
     return;
   }
 
   if (delegate_) {
     CallJS("setEnrollmentDomain", delegate_->GetEnrollmentDomain());
     CallJS("setMessage", delegate_->GetMessage());
   }
-  ShowScreen(OobeScreen::SCREEN_DEVICE_DISABLED);
+  ShowScreen(kScreenId);
 }
 
 void DeviceDisabledScreenHandler::Hide() {
   show_on_init_ = false;
 }
 
 void DeviceDisabledScreenHandler::SetDelegate(Delegate* delegate) {
   delegate_ = delegate;
   if (page_is_ready())
     Initialize();
@@ skipping 20 matching lines @@
   if (show_on_init_) {
     Show();
     show_on_init_ = false;
   }
 }
 
 void DeviceDisabledScreenHandler::RegisterMessages() {
 }
 
 }  // namespace chromeos