Remove usage of FOR_EACH_OBSERVER macro in storage

storage/browser/quota/special_storage_policy.cc

 // Copyright 2013 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 "storage/browser/quota/special_storage_policy.h"
 
 namespace storage {
 
 SpecialStoragePolicy::Observer::~Observer() {}
 
 SpecialStoragePolicy::SpecialStoragePolicy() {}
 
 SpecialStoragePolicy::~SpecialStoragePolicy() {}
 
 void SpecialStoragePolicy::AddObserver(Observer* observer) {
   observers_.AddObserver(observer);
 }
 
 void SpecialStoragePolicy::RemoveObserver(Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
 void SpecialStoragePolicy::NotifyGranted(const GURL& origin, int change_flags) {
   scoped_refptr<SpecialStoragePolicy> protect(this);
-  FOR_EACH_OBSERVER(Observer, observers_, OnGranted(origin, change_flags));
+  for (auto& observer : observers_)
+    observer.OnGranted(origin, change_flags);
 }
 
 void SpecialStoragePolicy::NotifyRevoked(const GURL& origin, int change_flags) {
   scoped_refptr<SpecialStoragePolicy> protect(this);
-  FOR_EACH_OBSERVER(Observer, observers_, OnRevoked(origin, change_flags));
+  for (auto& observer : observers_)
+    observer.OnRevoked(origin, change_flags);
 }
 
 void SpecialStoragePolicy::NotifyCleared() {
   scoped_refptr<SpecialStoragePolicy> protect(this);
-  FOR_EACH_OBSERVER(Observer, observers_, OnCleared());
+  for (auto& observer : observers_)
+    observer.OnCleared();
 }
 
 }  // namespace storage