cros: Break BaseScreenHandler into two classes.

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

 // Copyright 2013 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/gaia_screen_handler.h"
 
 #include "ash/common/system/chromeos/devicetype_utils.h"
 #include "base/bind.h"
 #include "base/callback.h"
 #include "base/guid.h"
@@ skipping 210 matching lines @@
 
   // GAPS cookie.
   std::string gaps_cookie;
 };
 
 GaiaScreenHandler::GaiaContext::GaiaContext() {}
 
 GaiaScreenHandler::GaiaScreenHandler(
     CoreOobeView* core_oobe_view,
     const scoped_refptr<NetworkStateInformer>& network_state_informer)
-    : network_state_informer_(network_state_informer),
+    : BaseScreenHandler(kScreenId),
+      network_state_informer_(network_state_informer),
       core_oobe_view_(core_oobe_view),
       weak_factory_(this) {
   DCHECK(network_state_informer_.get());
   set_call_js_prefix(kJsScreenPath);
 }
 
 GaiaScreenHandler::~GaiaScreenHandler() {
   if (network_portal_detector_)
     network_portal_detector_->RemoveObserver(this);
 }
@@ skipping 212 matching lines @@
     const NetworkPortalDetector::CaptivePortalState& state) {
   VLOG(1) << "OnPortalDetectionCompleted "
           << NetworkPortalDetector::CaptivePortalStatusString(state.status);
 
   const NetworkPortalDetector::CaptivePortalStatus previous_status =
       captive_portal_status_;
   captive_portal_status_ = state.status;
   if (offline_login_is_active() ||
       IsOnline(captive_portal_status_) == IsOnline(previous_status) ||
       disable_restrictive_proxy_check_for_test_ ||
-      GetCurrentScreen() != OobeScreen::SCREEN_GAIA_SIGNIN)
+      GetCurrentScreen() != kScreenId)
     return;
 
   LoadAuthExtension(true /* force */, false /* offline */);
 }
 
 void GaiaScreenHandler::HandleIdentifierEntered(const std::string& user_email) {
   if (!Delegate()->IsUserWhitelisted(user_manager::known_user::GetAccountId(
           user_email, std::string() /* id */, AccountType::UNKNOWN)))
     ShowWhitelistCheckFailedError();
 }
@@ skipping 495 matching lines @@
 SigninScreenHandlerDelegate* GaiaScreenHandler::Delegate() {
   return signin_screen_handler_->delegate_;
 }
 
 bool GaiaScreenHandler::IsRestrictiveProxy() const {
   return !disable_restrictive_proxy_check_for_test_ &&
          !IsOnline(captive_portal_status_);
 }
 
 }  // namespace chromeos