Remove usage of FOR_EACH_OBSERVER macro in storage

storage/browser/quota/special_storage_policy.cc

Index: storage/browser/quota/special_storage_policy.cc
diff --git a/storage/browser/quota/special_storage_policy.cc b/storage/browser/quota/special_storage_policy.cc
index 6e774505df51f1f7f49a0a1614991e8e71da857b..40125ac126eabd72b70d2dc855076f8c77db3a7e 100644
--- a/storage/browser/quota/special_storage_policy.cc
+++ b/storage/browser/quota/special_storage_policy.cc
@@ -22,17 +22,20 @@ void SpecialStoragePolicy::RemoveObserver(Observer* 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