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

chrome/browser/chromeos/first_run/drive_first_run_controller.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 "chrome/browser/chromeos/first_run/drive_first_run_controller.h"
 
 #include <stdint.h>
 #include <utility>
 
 #include "ash/common/system/tray/system_tray_delegate.h"
@@ skipping 407 matching lines @@
 void DriveFirstRunController::SetAppInfoForTest(
     const std::string& app_id,
     const std::string& endpoint_url) {
   DCHECK(!started_);
   drive_hosted_app_id_ = app_id;
   drive_offline_endpoint_url_ = endpoint_url;
 }
 
 void DriveFirstRunController::OnWebContentsTimedOut() {
   LOG(WARNING) << "Timed out waiting for web contents.";
-  FOR_EACH_OBSERVER(Observer, observer_list_, OnTimedOut());
+  for (auto& observer : observer_list_)
+    observer.OnTimedOut();
   OnOfflineInit(false, OUTCOME_WEB_CONTENTS_TIMED_OUT);
 }
 
 void DriveFirstRunController::CleanUp() {
   if (web_contents_manager_)
     web_contents_manager_->StopLoad();
   web_contents_timer_.Stop();
   base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, this);
 }
 
 void DriveFirstRunController::OnOfflineInit(bool success, UMAOutcome outcome) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   if (success)
     ShowNotification();
   UMA_HISTOGRAM_ENUMERATION("DriveOffline.CrosAutoEnableOutcome",
                             outcome, OUTCOME_MAX);
-  FOR_EACH_OBSERVER(Observer, observer_list_, OnCompletion(success));
+  for (auto& observer : observer_list_)
+    observer.OnCompletion(success);
   CleanUp();
 }
 
 void DriveFirstRunController::ShowNotification() {
   ExtensionService* service =
       extensions::ExtensionSystem::Get(profile_)->extension_service();
   DCHECK(service);
   const extensions::Extension* extension =
       service->GetExtensionById(drive_hosted_app_id_, false);
   DCHECK(extension);
@@ skipping 11 matching lines @@
           base::UTF8ToUTF16(extension->name()), GURL(),
           message_center::NotifierId(message_center::NotifierId::APPLICATION,
                                      kDriveHostedAppId),
           data, new DriveOfflineNotificationDelegate(profile_)));
   notification->set_priority(message_center::LOW_PRIORITY);
   message_center::MessageCenter::Get()->AddNotification(
       std::move(notification));
 }
 
 }  // namespace chromeos