Reduce usage of FOR_EACH_OBSERVER macro in components/

components/ntp_snippets/offline_pages/offline_page_proxy.cc

 // Copyright 2016 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 "components/ntp_snippets/offline_pages/offline_page_proxy.h"
 
 #include "base/bind.h"
 
 using offline_pages::MultipleOfflinePageItemResult;
 using offline_pages::MultipleOfflinePageItemCallback;
@@ skipping 31 matching lines @@
 }
 
 void OfflinePageProxy::OfflinePageModelChanged(OfflinePageModel* model) {
   DCHECK_EQ(offline_page_model_, model);
   FetchOfflinePagesAndNotify();
 }
 
 void OfflinePageProxy::OfflinePageDeleted(
     int64_t offline_id,
     const offline_pages::ClientId& client_id) {
-  FOR_EACH_OBSERVER(Observer, observers_,
-                    OfflinePageDeleted(offline_id, client_id));
+  for (Observer& observer : observers_)
+    observer.OfflinePageDeleted(offline_id, client_id);
 }
 
 void OfflinePageProxy::FetchOfflinePagesAndNotify() {
   offline_page_model_->GetAllPages(base::Bind(
       &OfflinePageProxy::OnOfflinePagesLoaded, weak_ptr_factory_.GetWeakPtr()));
 }
 
 void OfflinePageProxy::OnOfflinePagesLoaded(
     const MultipleOfflinePageItemResult& result) {
-  FOR_EACH_OBSERVER(Observer, observers_, OfflinePageModelChanged(result));
+  for (Observer& observer : observers_)
+    observer.OfflinePageModelChanged(result);
 }
 
 }  // namespace ntp_snippets