Remove FOR_EACH_OBSERVER macro usage in chrome/browser/sync_file_system

chrome/browser/sync_file_system/local/local_file_sync_context.cc

Index: chrome/browser/sync_file_system/local/local_file_sync_context.cc
diff --git a/chrome/browser/sync_file_system/local/local_file_sync_context.cc b/chrome/browser/sync_file_system/local/local_file_sync_context.cc
index ed2309ae5086a5aa06a1bd3b5b656e0f3d2d4d2f..90dec5284e7267ee71ef6c8dfeb93526ac351348 100644
--- a/chrome/browser/sync_file_system/local/local_file_sync_context.cc
+++ b/chrome/browser/sync_file_system/local/local_file_sync_context.cc
@@ -605,8 +605,8 @@ void LocalFileSyncContext::NotifyAvailableChangesOnIOThread() {
 void LocalFileSyncContext::NotifyAvailableChanges(
     const std::set<GURL>& origins,
     const std::vector<base::Closure>& callbacks) {
-  FOR_EACH_OBSERVER(LocalOriginChangeObserver, origin_change_observers_,
-                    OnChangesAvailableInOrigins(origins));
+  for (auto& observer : origin_change_observers_)
+    observer.OnChangesAvailableInOrigins(origins);
   for (const auto& callback : callbacks)
     callback.Run();
 }