ScreenObserver is renamed to BaseScreenDelegate.

chrome/browser/chromeos/login/enrollment/mock_auto_enrollment_check_screen.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/chromeos/login/enrollment/mock_auto_enrollment_check_screen.h"
 
 using ::testing::AtLeast;
 using ::testing::NotNull;
 
 namespace chromeos {
 
 MockAutoEnrollmentCheckScreen::MockAutoEnrollmentCheckScreen(
-    ScreenObserver* screen_observer,
+    BaseScreenDelegate* base_screen_delegate,
     AutoEnrollmentCheckScreenActor* actor)
-    : AutoEnrollmentCheckScreen(screen_observer,
-                                actor) {
+    : AutoEnrollmentCheckScreen(base_screen_delegate, actor) {
 }
 
 MockAutoEnrollmentCheckScreen::~MockAutoEnrollmentCheckScreen() { }
 
 MockAutoEnrollmentCheckScreenActor::MockAutoEnrollmentCheckScreenActor()
     : screen_(NULL) {
   EXPECT_CALL(*this, MockSetDelegate(NotNull())).Times(AtLeast(1));
 }
 
 
 MockAutoEnrollmentCheckScreenActor::~MockAutoEnrollmentCheckScreenActor() {
   if (screen_)
     screen_->OnActorDestroyed(this);
 }
 
 void MockAutoEnrollmentCheckScreenActor::SetDelegate(Delegate* screen) {
   screen_ = screen;
   MockSetDelegate(screen);
 }
 
 }  // namespace chromeos