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

chrome/browser/chromeos/system/device_disabling_manager.cc

 // Copyright 2014 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/system/device_disabling_manager.h"
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/values.h"
@@ skipping 65 matching lines @@
 
   UpdateFromCrosSettings();
 }
 
 void DeviceDisablingManager::CacheDisabledMessageAndNotify(
     const std::string& disabled_message) {
   if (disabled_message == disabled_message_)
     return;
 
   disabled_message_ = disabled_message;
-  FOR_EACH_OBSERVER(Observer,
-                    observers_,
-                    OnDisabledMessageChanged(disabled_message_));
+  for (auto& observer : observers_)
+    observer.OnDisabledMessageChanged(disabled_message_);
 }
 
 void DeviceDisablingManager::CheckWhetherDeviceDisabledDuringOOBE(
     const DeviceDisabledCheckCallback& callback) {
   if (policy::GetRestoreMode() != policy::RESTORE_MODE_DISABLED ||
       base::CommandLine::ForCurrentProcess()->HasSwitch(
           switches::kDisableDeviceDisabling)) {
     // Indicate that the device is not disabled if it is not marked as such in
     // local state or device disabling has been turned off by flag.
     callback.Run(false);
@@ skipping 121 matching lines @@
 
   // Cache the enrollment domain.
   enrollment_domain_ = browser_policy_connector_->GetEnterpriseDomain();
 
   // If no session or login is in progress, show the device disabled screen.
   delegate_->ShowDeviceDisabledScreen();
 }
 
 }  // namespace system
 }  // namespace chromeos