IDBObserver: Lifetime Management: Adding Observer

content/browser/indexed_db/indexed_db_observer.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_H_
+#define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_OBSERVER_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include "base/macros.h"
+#include "content/common/content_export.h"
+
+namespace content {
+
+class CONTENT_EXPORT IndexedDBObserver {
+ public:
+  IndexedDBObserver(int32_t observer_id);
+  ~IndexedDBObserver();
+
+  int32_t id() const { return observer_id_; }
+
+ private:
+  int32_t observer_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(IndexedDBObserver);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_OBSERVER_H_