Send IndexedDB observations through IDBDatabaseCallbacks.

content/browser/indexed_db/indexed_db_observer_changes.h

-// Copyright 2016 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 CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_OBSERVER_CHANGES_H_
-#define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_OBSERVER_CHANGES_H_
-
-#include <stddef.h>
-#include <stdint.h>
-
-#include <map>
-#include <memory>
-#include <utility>
-#include <vector>
-
-#include "base/macros.h"
-#include "content/browser/indexed_db/indexed_db_observation.h"
-#include "content/common/content_export.h"
-
-namespace content {
-
-class IndexedDBObservation;
-
-// Holds observations corresponding to a transaction for a single connection.
-class CONTENT_EXPORT IndexedDBObserverChanges {
- public:
-  IndexedDBObserverChanges();
-  ~IndexedDBObserverChanges();
-
-  void RecordObserverForLastObservation(int32_t observer_id);
-  void AddObservation(std::unique_ptr<IndexedDBObservation> observation);
-
-  std::map<int32_t, std::vector<int32_t>> release_observation_indices_map() {
-    return std::move(observation_indices_map_);
-  }
-  std::vector<std::unique_ptr<IndexedDBObservation>> release_observations() {
-    return std::move(observations_);
-  }
-
- private:
-  // Maps observer_id to corresponding set of indices in observations.
-  std::map<int32_t, std::vector<int32_t>> observation_indices_map_;
-  std::vector<std::unique_ptr<IndexedDBObservation>> observations_;
-
-  DISALLOW_COPY_AND_ASSIGN(IndexedDBObserverChanges);
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_OBSERVER_CHANGES_H_