Reduce usage of FOR_EACH_OBSERVER macro in content/

content/public/test/mock_download_item.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 "content/public/test/mock_download_item.h"
 
 namespace content {
 
 MockDownloadItem::MockDownloadItem() {}
 
 MockDownloadItem::~MockDownloadItem() {
-  FOR_EACH_OBSERVER(Observer, observers_, OnDownloadDestroyed(this));
+  for (auto& observer : observers_)
+    observer.OnDownloadDestroyed(this);
 }
 
 void MockDownloadItem::AddObserver(Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void MockDownloadItem::RemoveObserver(Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
 void MockDownloadItem::NotifyObserversDownloadOpened() {
-  FOR_EACH_OBSERVER(Observer, observers_, OnDownloadOpened(this));
+  for (auto& observer : observers_)
+    observer.OnDownloadOpened(this);
 }
 
 void MockDownloadItem::NotifyObserversDownloadRemoved() {
-  FOR_EACH_OBSERVER(Observer, observers_, OnDownloadRemoved(this));
+  for (auto& observer : observers_)
+    observer.OnDownloadRemoved(this);
 }
 
 void MockDownloadItem::NotifyObserversDownloadUpdated() {
-  FOR_EACH_OBSERVER(Observer, observers_, OnDownloadUpdated(this));
+  for (auto& observer : observers_)
+    observer.OnDownloadUpdated(this);
 }
 
 }