Replace FOR_EACH_OBSERVER in c/b/chromeos with range-based for

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 <stddef.h>
 #include <stdlib.h>
 #include <sys/types.h>
@@ skipping 602 matching lines @@
 
 void WizardController::AddObserver(Observer* observer) {
   observer_list_.AddObserver(observer);
 }
 
 void WizardController::RemoveObserver(Observer* observer) {
   observer_list_.RemoveObserver(observer);
 }
 
 void WizardController::OnSessionStart() {
-  FOR_EACH_OBSERVER(Observer, observer_list_, OnSessionStart());
+  for (auto& observer : observer_list_)
+    observer.OnSessionStart();
 }
 
 void WizardController::SkipUpdateEnrollAfterEula() {
   skip_update_enroll_after_eula_ = true;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 // WizardController, ExitHandlers:
 void WizardController::OnHIDDetectionCompleted() {
   // Check for tests configuration.
@@ skipping 276 matching lines @@
   // flow has been switched to sign in screen (ExistingUserController).
   if (!oobe_ui_)
     return;
 
   // First remember how far have we reached so that we can resume if needed.
   if (is_out_of_box_ && IsResumableScreen(current_screen_->GetName()))
     StartupUtils::SaveOobePendingScreen(current_screen_->GetName());
 
   smooth_show_timer_.Stop();
 
-  FOR_EACH_OBSERVER(Observer, observer_list_, OnScreenChanged(current_screen_));
+  for (auto& observer : observer_list_)
+    observer.OnScreenChanged(current_screen_);
 
   current_screen_->Show();
 }
 
 void WizardController::SetCurrentScreenSmooth(BaseScreen* new_current,
                                               bool use_smoothing) {
   if (current_screen_ == new_current || new_current == nullptr ||
       oobe_ui_ == nullptr) {
     return;
   }
@@ skipping 518 matching lines @@
             : policy::EnrollmentConfig::MODE_MANUAL_REENROLLMENT;
   }
 
   EnrollmentScreen* screen = EnrollmentScreen::Get(this);
   screen->SetParameters(effective_config, shark_controller_.get());
   SetStatusAreaVisible(true);
   SetCurrentScreen(screen);
 }
 
 }  // namespace chromeos