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

chrome/browser/chromeos/policy/device_cloud_policy_manager_chromeos.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/policy/device_cloud_policy_manager_chromeos.h"
 
 #include <stddef.h>
 
 #include <utility>
 
@@ skipping 298 matching lines @@
         local_state_->SetBoolean(
             prefs::kDeviceEnrollmentCanExit,
             GetMachineFlag(chromeos::system::kOemCanExitEnterpriseEnrollmentKey,
                            false));
       }
     }
   }
 }
 
 void DeviceCloudPolicyManagerChromeOS::NotifyConnected() {
-  FOR_EACH_OBSERVER(
-      Observer, observers_, OnDeviceCloudPolicyManagerConnected());
+  for (auto& observer : observers_)
+    observer.OnDeviceCloudPolicyManagerConnected();
 }
 
 void DeviceCloudPolicyManagerChromeOS::NotifyDisconnected() {
-  FOR_EACH_OBSERVER(
-      Observer, observers_, OnDeviceCloudPolicyManagerDisconnected());
+  for (auto& observer : observers_)
+    observer.OnDeviceCloudPolicyManagerDisconnected();
 }
 
 void DeviceCloudPolicyManagerChromeOS::CreateStatusUploader() {
   status_uploader_.reset(new StatusUploader(
       client(),
       base::MakeUnique<DeviceStatusCollector>(
           local_state_, chromeos::system::StatisticsProvider::GetInstance(),
           DeviceStatusCollector::VolumeInfoFetcher(),
           DeviceStatusCollector::CPUStatisticsFetcher(),
           DeviceStatusCollector::CPUTempFetcher(),
           DeviceStatusCollector::AndroidStatusFetcher()),
       task_runner_));
 }
 
 }  // namespace policy