[IndexedDB] Propogating changes to observers : Renderer

third_party/WebKit/Source/modules/indexeddb/IDBObserverCallback.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 IDBObserverCallback_h
 #define IDBObserverCallback_h
 
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class ExecutionContext;
 class IDBObserver;
+class IDBObserverChanges;
 
 class IDBObserverCallback : public GarbageCollectedFinalized<IDBObserverCallback> {
 public:
     virtual ~IDBObserverCallback() {}
+    virtual void handleChanges(IDBObserverChanges&, IDBObserver&) = 0;
     virtual ExecutionContext* getExecutionContext() const = 0;
     DEFINE_INLINE_VIRTUAL_TRACE() {}
 };
 
 } // namespace blink
 
 #endif // IDBObserverCallback_h