cros: Break BaseScreenHandler into two classes.

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

 // Copyright (c) 2012 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/network_screen_handler.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 37 matching lines @@
 
 const char kJsScreenPath[] = "login.NetworkScreen";
 
 }  // namespace
 
 namespace chromeos {
 
 // NetworkScreenHandler, public: -----------------------------------------------
 
 NetworkScreenHandler::NetworkScreenHandler(CoreOobeView* core_oobe_view)
-    : core_oobe_view_(core_oobe_view) {
+    : BaseScreenHandler(kScreenId), core_oobe_view_(core_oobe_view) {
   set_call_js_prefix(kJsScreenPath);
   DCHECK(core_oobe_view_);
 }
 
 NetworkScreenHandler::~NetworkScreenHandler() {
   if (screen_)
     screen_->OnViewDestroyed(this);
 }
 
 // NetworkScreenHandler, NetworkScreenView implementation: ---------------------
@@ skipping 21 matching lines @@
   // should be able to select any of the available networks on the device.
   NetworkStateHandler* handler = NetworkHandler::Get()->network_state_handler();
   handler->SetTechnologyEnabled(NetworkTypePattern::NonVirtual(),
                                 true,
                                 chromeos::network_handler::ErrorCallback());
 
   base::DictionaryValue network_screen_params;
   network_screen_params.SetBoolean("isDeveloperMode",
       base::CommandLine::ForCurrentProcess()->HasSwitch(
           chromeos::switches::kSystemDevMode));
-  ShowScreenWithData(OobeScreen::SCREEN_OOBE_NETWORK, &network_screen_params);
+  ShowScreenWithData(kScreenId, &network_screen_params);
   core_oobe_view_->InitDemoModeDetection();
 }
 
 void NetworkScreenHandler::Hide() {
 }
 
 void NetworkScreenHandler::Bind(NetworkScreen* screen) {
   screen_ = screen;
   BaseScreenHandler::SetBaseScreen(screen_);
 }
@@ skipping 178 matching lines @@
     timezone_option->SetString("value", timezone_id);
     timezone_option->SetString("title", timezone_name);
     timezone_option->SetBoolean("selected", timezone_id == current_timezone_id);
     timezone_list->Append(std::move(timezone_option));
   }
 
   return timezone_list.release();
 }
 
 }  // namespace chromeos