cros: Break BaseScreenHandler into two classes.

chrome/browser/ui/webui/chromeos/login/arc_kiosk_splash_screen_handler.cc

 // Copyright 2017 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/arc_kiosk_splash_screen_handler.h"
 
 #include <memory>
 
 #include "base/memory/ptr_util.h"
 #include "base/values.h"
 #include "chrome/grit/chrome_unscaled_resources.h"
 #include "chrome/grit/chromium_strings.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/login/localized_values_builder.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/base/webui/web_ui_util.h"
 #include "ui/gfx/image/image_skia.h"
 
 namespace {
 
 constexpr char kJsScreenPath[] = "login.ArcKioskSplashScreen";
 }
 
 namespace chromeos {
 
-ArcKioskSplashScreenHandler::ArcKioskSplashScreenHandler() {
+ArcKioskSplashScreenHandler::ArcKioskSplashScreenHandler()
+    : BaseScreenHandler(kScreenId) {
   set_call_js_prefix(kJsScreenPath);
 }
 
 ArcKioskSplashScreenHandler::~ArcKioskSplashScreenHandler() = default;
 
 void ArcKioskSplashScreenHandler::DeclareLocalizedValues(
     ::login::LocalizedValuesBuilder* builder) {
   builder->Add("arcKioskStartMessage", IDS_APP_START_APP_WAIT_MESSAGE);
 
   const base::string16 product_os_name =
@@ skipping 16 matching lines @@
     show_on_init_ = true;
     return;
   }
 
   base::DictionaryValue data;
   // |data| will take ownership of |app_info|.
   std::unique_ptr<base::DictionaryValue> app_info =
       base::MakeUnique<base::DictionaryValue>();
   PopulateAppInfo(app_info.get());
   data.Set("appInfo", std::move(app_info));
-  ShowScreenWithData(OobeScreen::SCREEN_ARC_KIOSK_SPLASH, &data);
+  ShowScreenWithData(kScreenId, &data);
 }
 
 void ArcKioskSplashScreenHandler::RegisterMessages() {
   AddCallback("cancelArcKioskLaunch",
               &ArcKioskSplashScreenHandler::HandleCancelArcKioskLaunch);
 }
 
 void ArcKioskSplashScreenHandler::UpdateArcKioskState(ArcKioskState state) {
   if (!page_is_ready())
     return;
@@ skipping 37 matching lines @@
 
 void ArcKioskSplashScreenHandler::HandleCancelArcKioskLaunch() {
   if (!delegate_) {
     LOG(WARNING) << "No delegate set to handle cancel app launch";
     return;
   }
   delegate_->OnCancelArcKioskLaunch();
 }
 
 }  // namespace chromeos