ScreenObserver is renamed to BaseScreenDelegate.

chrome/browser/chromeos/login/screens/terms_of_service_screen.h

 // Copyright (c) 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_TERMS_OF_SERVICE_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_TERMS_OF_SERVICE_SCREEN_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/timer/timer.h"
 #include "chrome/browser/chromeos/login/screens/base_screen.h"
 #include "chrome/browser/chromeos/login/screens/terms_of_service_screen_actor.h"
 #include "net/url_request/url_fetcher_delegate.h"
 
 namespace net {
 class URLFetcher;
 }
 
 namespace chromeos {
 
-class ScreenObserver;
+class BaseScreenDelegate;
 
 // A screen that shows Terms of Service which have been configured through
 // policy. The screen is shown during login and requires the user to accept the
 // Terms of Service before proceeding. Currently, Terms of Service are available
 // for public sessions only.
 class TermsOfServiceScreen : public BaseScreen,
                              public TermsOfServiceScreenActor::Delegate,
                              public net::URLFetcherDelegate {
  public:
-  TermsOfServiceScreen(ScreenObserver* screen_observer,
+  TermsOfServiceScreen(BaseScreenDelegate* base_screen_delegate,
                        TermsOfServiceScreenActor* actor);
   virtual ~TermsOfServiceScreen();
 
   // BaseScreen:
   virtual void PrepareToShow() override;
   virtual void Show() override;
   virtual void Hide() override;
   virtual std::string GetName() const override;
 
   // TermsOfServiceScreenActor::Delegate:
@@ skipping 18 matching lines @@
   // Timer that enforces a custom (shorter) timeout on the attempt to download
   // the Terms of Service.
   base::OneShotTimer<TermsOfServiceScreen> download_timer_;
 
   DISALLOW_COPY_AND_ASSIGN(TermsOfServiceScreen);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_TERMS_OF_SERVICE_SCREEN_H_