Remove FOR_EACH_OBSERVER macro usage in chrome/browser/sync_file_system

chrome/browser/sync_file_system/mock_remote_file_sync_service.cc

Index: chrome/browser/sync_file_system/mock_remote_file_sync_service.cc
diff --git a/chrome/browser/sync_file_system/mock_remote_file_sync_service.cc b/chrome/browser/sync_file_system/mock_remote_file_sync_service.cc
index d9e30f15fa785da037327920b8f85193e51c273f..35cea613b45d688d4c636b39605a597825de87cd 100644
--- a/chrome/browser/sync_file_system/mock_remote_file_sync_service.cc
+++ b/chrome/browser/sync_file_system/mock_remote_file_sync_service.cc
@@ -57,15 +57,15 @@ void MockRemoteFileSyncService::SetServiceState(RemoteServiceState state) {
 
 void MockRemoteFileSyncService::NotifyRemoteChangeQueueUpdated(
     int64_t pending_changes) {
-  FOR_EACH_OBSERVER(Observer, service_observers_,
-                    OnRemoteChangeQueueUpdated(pending_changes));
+  for (auto& observer : service_observers_)
+    observer.OnRemoteChangeQueueUpdated(pending_changes);
 }
 
 void MockRemoteFileSyncService::NotifyRemoteServiceStateUpdated(
     RemoteServiceState state,
     const std::string& description) {
-  FOR_EACH_OBSERVER(Observer, service_observers_,
-                    OnRemoteServiceStateUpdated(state, description));
+  for (auto& observer : service_observers_)
+    observer.OnRemoteServiceStateUpdated(state, description);
 }
 
 void MockRemoteFileSyncService::NotifyFileStatusChanged(
@@ -74,9 +74,10 @@ void MockRemoteFileSyncService::NotifyFileStatusChanged(
     SyncFileStatus sync_status,
     SyncAction action_taken,
     SyncDirection direction) {
-  FOR_EACH_OBSERVER(FileStatusObserver, file_status_observers_,
-                    OnFileStatusChanged(url, file_type, sync_status,
-                                        action_taken, direction));
+  for (auto& observer : file_status_observers_) {
+    observer.OnFileStatusChanged(url, file_type, sync_status, action_taken,
+                                 direction);
+  }
 }
 
 void MockRemoteFileSyncService::AddServiceObserverStub(Observer* observer) {