ScreenObserver is renamed to BaseScreenDelegate.

chrome/browser/chromeos/login/wizard_controller.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/wizard_controller.h"
 
 #include <signal.h>
 #include <stdlib.h>
 #include <sys/types.h>
 
@@ skipping 921 matching lines @@
       } else {
         ShowNetworkScreen();
       }
     } else {
       ShowLoginScreen(LoginScreenContext());
     }
   }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
-// WizardController, chromeos::ScreenObserver overrides:
+// WizardController, chromeos::BaseScreenDelegate overrides:
 void WizardController::OnExit(ExitCodes exit_code) {
   VLOG(1) << "Wizard screen exit code: " << exit_code;
   std::string previous_screen_id = current_screen_->GetName();
   if (IsOOBEStepToTrack(previous_screen_id)) {
     RecordUMAHistogramForOOBEStepCompletionTime(
         previous_screen_id,
         base::Time::Now() - screen_show_times_[previous_screen_id]);
   }
   switch (exit_code) {
     case HID_DETECTION_COMPLETED:
@@ skipping 347 matching lines @@
     scoped_ptr<pairing_chromeos::HostPairingController> remora_controller) {
   VLOG(1) << "OnSharkConnected";
   remora_controller_ = remora_controller.Pass();
   base::MessageLoop::current()->DeleteSoon(
       FROM_HERE, shark_connection_listener_.release());
   shark_controller_detected_ = true;
   ShowHostPairingScreen();
 }
 
 }  // namespace chromeos