Invalidation trickles mega-patch

sync/notifier/ack_handler.h

+// Copyright 2013 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 SYNC_NOTIFIER_ACK_HANDLER_H_
+#define SYNC_NOTIFIER_ACK_HANDLER_H_
+
+#include <vector>
+
+#include "sync/base/sync_export.h"
+
+namespace invalidation {
+class ObjectId;
+}  // namespace invalidation
+
+namespace syncer {
+
+class AckHandle;
+
+class SYNC_EXPORT AckHandler {
+ public:
+  AckHandler();
+  virtual ~AckHandler() = 0;
+
+  virtual void Acknowledge(
+      const invalidation::ObjectId& id,
+      const AckHandle& handle) = 0;
+  virtual void Drop(
+      const invalidation::ObjectId& id,
+      const AckHandle& handle) = 0;
+};
+
+}  // namespace syncer
+
+#endif  // SYNC_NOTIFIER_ACK_HANDLER_H_