Invalidation trickles mega-patch

sync/notifier/dropped_invalidation_tracker.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_DROPPED_INVALIDATION_TRACKER_H_
+#define SYNC_NOTIFIER_DROPPED_INVALIDATION_TRACKER_H_
+
+#include "google/cacheinvalidation/include/types.h"
+#include "sync/base/sync_export.h"
+#include "sync/internal_api/public/base/ack_handle.h"
+#include "sync/internal_api/public/util/weak_handle.h"
+#include "sync/notifier/ack_handler.h"
+
+namespace syncer {
+
+class Invalidation;
+
+class SYNC_EXPORT DroppedInvalidationTracker {
+ public:
+  DroppedInvalidationTracker(const invalidation::ObjectId& id);
+  ~DroppedInvalidationTracker();
+
+  const invalidation::ObjectId&  GetObjectId() const;
+
+  void Drop(WeakHandle<AckHandler> handler, AckHandle handle);
+
+  void RecoverFromDropEvent();
+  bool IsRecoveringFromDropEvent() const;
+
+ private:
+  invalidation::ObjectId id_;
+  AckHandle drop_ack_handle_;
+  WeakHandle<AckHandler> drop_ack_handler_;
+
+  DISALLOW_COPY_AND_ASSIGN(DroppedInvalidationTracker);
+};
+
+}  // namespace syncer
+
+#endif  // SYNC_NOTIFIER_DROPPED_INVALIDATION_TRACKER_H_