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.
+
+// This class makes the blink::IDBObserver visible to the content layer by holding a reference to it.
+
+// TODO(palakj): Comment on ownership and thread safe guarnatees.
+
+#ifndef WebIDBObserver_h
+#define WebIDBObserver_h
+
+namespace blink {
+
+class WebIDBObserver {
+public:
+    virtual ~WebIDBObserver() {}
+    virtual void setId(int32_t) = 0;
+};
+
+} // namespace blink
+
+#endif // WebIDBObserver_h