ScreenObserver is renamed to BaseScreenDelegate.

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

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_NETWORK_SCREEN_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_NETWORK_SCREEN_H_
 
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/strings/string16.h"
 #include "base/timer/timer.h"
 #include "chrome/browser/chromeos/login/screens/base_screen.h"
 #include "chrome/browser/chromeos/login/screens/network_screen_actor.h"
 #include "chromeos/network/network_state_handler_observer.h"
 
 namespace chromeos {
 
 class ScreenManager;
 
 namespace login {
 class NetworkStateHelper;
 }  // namespace login
 
 class NetworkScreen : public BaseScreen,
                       public NetworkStateHandlerObserver,
                       public NetworkScreenActor::Delegate {
  public:
-  NetworkScreen(ScreenObserver* screen_observer, NetworkScreenActor* actor);
+  NetworkScreen(BaseScreenDelegate* base_screen_delegate,
+                NetworkScreenActor* actor);
   virtual ~NetworkScreen();
 
   static NetworkScreen* Get(ScreenManager* manager);
 
   // BaseScreen implementation:
   virtual void PrepareToShow() override;
   virtual void Show() override;
   virtual void Hide() override;
   virtual std::string GetName() const override;
 
@@ skipping 58 matching lines @@
 
   NetworkScreenActor* actor_;
   scoped_ptr<login::NetworkStateHelper> network_state_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkScreen);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SCREENS_NETWORK_SCREEN_H_