IDBObserver: Lifetime Management: Adding Observer

third_party/WebKit/public/platform/modules/indexeddb/WebIDBObserver.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 WebIDBObserver_h
+#define WebIDBObserver_h
+
+#include "public/platform/WebPrivatePtr.h"
+
+namespace blink {
+
+class IDBObserver;
+
+class WebIDBObserver {
+public:
+    BLINK_EXPORT virtual ~WebIDBObserver();
+    WebIDBObserver() {}
+
+#if INSIDE_BLINK
+    WebIDBObserver(IDBObserver*);
+#endif
+
+private:
+    WebPrivatePtr<IDBObserver, WebPrivatePtrDestructionCrossThread> m_observer;
+};
+
+} // namespace blink
+
+#endif // WebIDBObserver_h