Remove usage of FOR_EACH_OBSERVER macro in ash/

ash/first_run/first_run_helper_impl.cc

 // Copyright 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.
 
 #include "ash/first_run/first_run_helper_impl.h"
 
 #include "ash/common/shelf/app_list_button.h"
 #include "ash/common/shelf/shelf_widget.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/shell_window_ids.h"
@@ skipping 44 matching lines @@
   return widget_;
 }
 
 gfx::Rect FirstRunHelperImpl::GetAppListButtonBounds() {
   WmShelf* shelf = WmShelf::ForWindow(WmShell::Get()->GetPrimaryRootWindow());
   AppListButton* app_button = shelf->shelf_widget()->GetAppListButton();
   return app_button->GetBoundsInScreen();
 }
 
 void FirstRunHelperImpl::Cancel() {
-  FOR_EACH_OBSERVER(Observer, observers(), OnCancelled());
+  for (auto& observer : observers())
+    observer.OnCancelled();
 }
 
 bool FirstRunHelperImpl::IsCancelingKeyEvent(ui::KeyEvent* event) {
   return event->key_code() == ui::VKEY_ESCAPE;
 }
 
 aura::Window* FirstRunHelperImpl::GetWindow() {
   return widget_->GetNativeWindow();
 }
 
@@ skipping 19 matching lines @@
   return bubble->GetBoundsInScreen();
 }
 
 gfx::Rect FirstRunHelperImpl::GetHelpButtonBounds() {
   SystemTray* tray = Shell::GetInstance()->GetPrimarySystemTray();
   views::View* help_button = tray->GetHelpButtonView();
   return help_button->GetBoundsInScreen();
 }
 
 }  // namespace ash