[Sync] Split DirectoryChangeListener for thread-safety

chrome/browser/sync/syncable/directory_change_listener.h

Index: chrome/browser/sync/syncable/directory_change_listener.h
diff --git a/chrome/browser/sync/syncable/directory_change_listener.h b/chrome/browser/sync/syncable/directory_change_listener.h
deleted file mode 100644
index 0867cb74867e28d424023cbcd744dd55ac5b21b4..0000000000000000000000000000000000000000
--- a/chrome/browser/sync/syncable/directory_change_listener.h
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright (c) 2011 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.
-
-#ifndef CHROME_BROWSER_SYNC_SYNCABLE_DIRECTORY_CHANGE_LISTENER_H_
-#define CHROME_BROWSER_SYNC_SYNCABLE_DIRECTORY_CHANGE_LISTENER_H_
-#pragma once
-
-#include "chrome/browser/sync/syncable/model_type.h"
-#include "chrome/browser/sync/syncable/syncable.h"
-
-namespace syncable {
-
-// This is an interface for listening to directory change events, triggered by
-// the releasing of the syncable transaction. The listener performs work to
-// 1. Calculate changes, depending on the source of the transaction
-//    (HandleCalculateChangesChangeEventFromSyncer/Syncapi).
-// 2. Perform final work while the transaction is held
-//    (HandleTransactionEndingChangeEvent).
-// 3. Perform any work that should be done after the transaction is released.
-//    (HandleTransactionCompleteChangeEvent).
-class DirectoryChangeListener {
- public:
-  virtual void HandleCalculateChangesChangeEventFromSyncApi(
-      const OriginalEntries& originals,
-      const WriterTag& writer,
-      BaseTransaction* trans) = 0;
-  virtual void HandleCalculateChangesChangeEventFromSyncer(
-      const OriginalEntries& originals,
-      const WriterTag& writer,
-      BaseTransaction* trans) = 0;
-  virtual ModelTypeBitSet HandleTransactionEndingChangeEvent(
-      BaseTransaction* trans) = 0;
-  virtual void HandleTransactionCompleteChangeEvent(
-      const ModelTypeBitSet& models_with_changes) = 0;
- protected:
-  virtual ~DirectoryChangeListener() {}
-};
-
-}  // namespace syncable
-
-#endif  // CHROME_BROWSER_SYNC_SYNCABLE_DIRECTORY_CHANGE_LISTENER_H_