drive: Call OnDirectoryChanged from EntryRevertPerformer

chrome/browser/chromeos/drive/sync/entry_update_performer.h

Index: chrome/browser/chromeos/drive/sync/entry_update_performer.h
diff --git a/chrome/browser/chromeos/drive/sync/entry_update_performer.h b/chrome/browser/chromeos/drive/sync/entry_update_performer.h
index c57e9cd1275c88c09f8e585030b7d0864b7e194d..2ac538ff0c496c099df9e9989380dd35897c4276 100644
--- a/chrome/browser/chromeos/drive/sync/entry_update_performer.h
+++ b/chrome/browser/chromeos/drive/sync/entry_update_performer.h
@@ -25,6 +25,10 @@ namespace drive {
 class JobScheduler;
 class ResourceEntry;
 
+namespace file_system {
+class OperationObserver;
+}  // namespace file_system
+
 namespace internal {
 
 class EntryRevertPerformer;
@@ -35,6 +39,7 @@ class ResourceMetadata;
 class EntryUpdatePerformer {
  public:
   EntryUpdatePerformer(base::SequencedTaskRunner* blocking_task_runner,
+                       file_system::OperationObserver* observer,
                        JobScheduler* scheduler,
                        ResourceMetadata* metadata);
   ~EntryUpdatePerformer();