Send IndexedDB observations through IDBDatabaseCallbacks.

third_party/WebKit/Source/modules/indexeddb/WebIDBDatabaseCallbacksImpl.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 52 matching lines @@
     m_callbacks->onAbort(transactionId,
                          DOMException::create(error.code(), error.message()));
   }
 }
 
 void WebIDBDatabaseCallbacksImpl::onComplete(long long transactionId) {
   if (m_callbacks)
     m_callbacks->onComplete(transactionId);
 }
 
+void WebIDBDatabaseCallbacksImpl::onChanges(
+    const std::unordered_map<int32_t, std::vector<int32_t>>&
+        observation_index_map,
+    const WebVector<WebIDBObservation>& observations) {
+  if (m_callbacks)
+    m_callbacks->onChanges(observation_index_map, observations);
+}
+
 void WebIDBDatabaseCallbacksImpl::detach() {
   m_callbacks.clear();
 }
 
 }  // namespace blink