IDBObserver: Lifetime Management: Adding Observer

content/browser/indexed_db/indexed_db_observer.h

Index: content/browser/indexed_db/indexed_db_observer.h
diff --git a/content/browser/indexed_db/indexed_db_observer.h b/content/browser/indexed_db/indexed_db_observer.h
new file mode 100644
index 0000000000000000000000000000000000000000..477e67ca096dbb128d8138b023aaf3570beeba72
--- /dev/null
+++ b/content/browser/indexed_db/indexed_db_observer.h
@@ -0,0 +1,30 @@
+// 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:
+  DISALLOW_COPY_AND_ASSIGN(IndexedDBObserver);

[dmurph, 2016/07/06 18:25:10]

nit: we usually put these statements at the end of the class, after the class
members. So:

private:
  int32_t observer_id_;

  DISALLOW_COPY_AND_ASSIGN(IndexedDBObserver);
};

[palakj1, 2016/07/06 18:58:44]

Oops! changing this with the next patch.

+  int32_t observer_id_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_OBSERVER_H_