[SyncFileSystem] Remove existing entry on LocalFileSyncContext::ApplyRemoteChange call.

webkit/fileapi/syncable/local_file_sync_context.h

Index: webkit/fileapi/syncable/local_file_sync_context.h
diff --git a/webkit/fileapi/syncable/local_file_sync_context.h b/webkit/fileapi/syncable/local_file_sync_context.h
index cb765d3926d36e9a8fe5a892084c7e72d67f063f..57c5b9ba37a0c81ef50c36c94f6a6cd6e2abb046 100644
--- a/webkit/fileapi/syncable/local_file_sync_context.h
+++ b/webkit/fileapi/syncable/local_file_sync_context.h
@@ -233,6 +233,14 @@ class WEBKIT_STORAGE_EXPORT LocalFileSyncContext
   // Helper routine for ClearSyncFlagForURL.
   void EnableWritingOnIOThread(const fileapi::FileSystemURL& url);
 
+  void DidRemoveExistingEntryForApplyRemoteChange(
+      fileapi::FileSystemContext* file_system_context,
+      const FileChange& change,
+      const base::FilePath& local_path,
+      const fileapi::FileSystemURL& url,
+      const SyncStatusCallback& callback,
+      base::PlatformFileError error);
+
   // Callback routine for ApplyRemoteChange.
   void DidApplyRemoteChange(
       const fileapi::FileSystemURL& url,