Clear syncing flag after a remote or local sync

chrome/browser/sync_file_system/local_file_sync_service.h

Index: chrome/browser/sync_file_system/local_file_sync_service.h
diff --git a/chrome/browser/sync_file_system/local_file_sync_service.h b/chrome/browser/sync_file_system/local_file_sync_service.h
index 8efa7489bbb712fd0e8b8e46d61c9fae3382546c..465c50ca3d303ff2004023c887d075371d69b8fd 100644
--- a/chrome/browser/sync_file_system/local_file_sync_service.h
+++ b/chrome/browser/sync_file_system/local_file_sync_service.h
@@ -89,6 +89,10 @@ class LocalFileSyncService
       const fileapi::FileSystemURL& url,
       const HasPendingLocalChangeCallback& callback);
 
+  // A local or remote sync has been finished (either successfully or
+  // with an error). Clears the internal sync flag and enable writing for |url|.
+  void ClearSyncFlagForURL(const fileapi::FileSystemURL& url);
+
   // Returns the metadata of a remote file pointed by |url|.
   virtual void GetLocalFileMetadata(
       const fileapi::FileSystemURL& url,