ScreenObserver::(Set|Get)UsageStatisticsReporting() are extracted into EulaScreen::Delegate.

chrome/browser/chromeos/login/screens/eula_screen.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/chromeos/login/screens/eula_screen.h"
 
 #include "base/logging.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/customization_document.h"
 #include "chrome/browser/chromeos/login/screens/screen_observer.h"
 #include "chrome/browser/chromeos/login/wizard_controller.h"
 #include "chromeos/dbus/cryptohome_client.h"
 #include "chromeos/dbus/dbus_method_call_status.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 
 namespace chromeos {
 
 EulaScreen::EulaScreen(ScreenObserver* observer, EulaScreenActor* actor)
     : BaseScreen(observer), actor_(actor), password_fetcher_(this) {
   DCHECK(actor_);
   if (actor_)
     actor_->SetDelegate(this);
 }
 
 EulaScreen::~EulaScreen() {
   if (actor_)
     actor_->SetDelegate(NULL);
 }
 
+void EulaScreen::SetDelegate(Delegate* delegate) {
+  DCHECK(delegate);
+  delegate_ = delegate;
+}
+
 void EulaScreen::PrepareToShow() {
   if (actor_)
     actor_->PrepareToShow();
 }
 
 void EulaScreen::Show() {
   // Command to own the TPM.
   DBusThreadManager::Get()->GetCryptohomeClient()->TpmCanAttemptOwnership(
       EmptyVoidDBusMethodCallback());
   if (actor_)
@@ skipping 21 matching lines @@
       return GURL(eula_page);
 
     VLOG(1) << "No eula found for locale: " << locale;
   } else {
     LOG(ERROR) << "No manifest found.";
   }
   return GURL();
 }
 
 void EulaScreen::OnExit(bool accepted, bool usage_stats_enabled) {
-  get_screen_observer()->SetUsageStatisticsReporting(usage_stats_enabled);
+  if (delegate_)
+    delegate_->SetUsageStatisticsReporting(usage_stats_enabled);
   get_screen_observer()->OnExit(accepted
                    ? ScreenObserver::EULA_ACCEPTED
                    : ScreenObserver::EULA_BACK);
 }
 
 void EulaScreen::InitiatePasswordFetch() {
   if (tpm_password_.empty()) {
     password_fetcher_.Fetch();
     // Will call actor after password has been fetched.
   } else if (actor_) {
     actor_->OnPasswordFetched(tpm_password_);
   }
 }
 
 void EulaScreen::OnPasswordFetched(const std::string& tpm_password) {
   tpm_password_ = tpm_password;
   if (actor_)
     actor_->OnPasswordFetched(tpm_password_);
 }
 
 bool EulaScreen::IsUsageStatsEnabled() const {
-  return get_screen_observer()->GetUsageStatisticsReporting();
+  return delegate_ && delegate_->GetUsageStatisticsReporting();
 }
 
 void EulaScreen::OnActorDestroyed(EulaScreenActor* actor) {
   if (actor_ == actor)
     actor_ = NULL;
 }
 
 }  // namespace chromeos