Remove usage of FOR_EACH_OBSERVER macro in device/

device/bluetooth/bluez/bluetooth_advertisement_bluez.cc

 // Copyright 2015 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 "device/bluetooth/bluez/bluetooth_advertisement_bluez.h"
 
 #include <memory>
 #include <string>
 
 #include "base/bind.h"
@@ skipping 112 matching lines @@
       ->GetBluetoothLEAdvertisingManagerClient()
       ->UnregisterAdvertisement(
           adapter_->object_path(), provider_->object_path(), success_callback,
           base::Bind(&UnregisterErrorCallbackConnector, error_callback));
   provider_.reset();
 }
 
 void BluetoothAdvertisementBlueZ::Released() {
   LOG(WARNING) << "Advertisement released.";
   provider_.reset();
-  FOR_EACH_OBSERVER(BluetoothAdvertisement::Observer, observers_,
-                    AdvertisementReleased(this));
+  for (auto& observer : observers_)
+    observer.AdvertisementReleased(this);
 }
 
 }  // namespace bluez