Send IndexedDB observations through IDBDatabaseCallbacks.

third_party/WebKit/public/platform/modules/indexeddb/WebIDBDatabaseCallbacks.h

 /*
  * 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
  *     notice, this list of conditions and the following disclaimer in the
  *     documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 #ifndef WebIDBDatabaseCallbacks_h
 #define WebIDBDatabaseCallbacks_h
 
 #include "public/platform/WebCommon.h"
-#include "public/platform/WebString.h"
+#include "public/platform/WebVector.h"
 #include "public/platform/modules/indexeddb/WebIDBDatabaseError.h"
 
+#include <unordered_map>
+
 namespace blink {
 
+struct WebIDBObservation;
+
 class WebIDBDatabaseCallbacks {
  public:
   virtual ~WebIDBDatabaseCallbacks() {}
 
   virtual void onForcedClose() = 0;
   virtual void onVersionChange(long long oldVersion, long long newVersion) = 0;
 
   virtual void onAbort(long long transactionId, const WebIDBDatabaseError&) = 0;
   virtual void onComplete(long long transactionId) = 0;
+  virtual void onChanges(
+      const std::unordered_map<int32_t, std::vector<int32_t>>&
+          observation_index_map,
+      const WebVector<WebIDBObservation>& observations) = 0;
   virtual void detach() = 0;
 };
 
 }  // namespace blink
 
 #endif  // WebIDBDatabaseCallbacks_h