[IndexedDB] Adding transaction and value support to observers

third_party/WebKit/Source/modules/indexeddb/IDBDatabaseCallbacks.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
@@ skipping 25 matching lines @@
 namespace blink {
 
 class DOMException;
 class IDBDatabase;
 class WebIDBDatabaseCallbacks;
 struct WebIDBObservation;
 
 class MODULES_EXPORT IDBDatabaseCallbacks
     : public GarbageCollectedFinalized<IDBDatabaseCallbacks> {
  public:
+  // Maps observer to transaction, which needs an id and a scope.
+  using TransactionMap =
+      std::unordered_map<int32_t, std::pair<int64_t, std::vector<int64_t>>>;
+
   static IDBDatabaseCallbacks* create();
   virtual ~IDBDatabaseCallbacks();
   DECLARE_TRACE();
 
   // IDBDatabaseCallbacks
   virtual void onForcedClose();
   virtual void onVersionChange(int64_t oldVersion, int64_t newVersion);
 
   virtual void onAbort(int64_t transactionId, DOMException*);
   virtual void onComplete(int64_t transactionId);
   virtual void onChanges(
       const std::unordered_map<int32_t, std::vector<int32_t>>&
           observation_index_map,
-      const WebVector<WebIDBObservation>& observations);
+      const WebVector<WebIDBObservation>& observations,
+      const TransactionMap& transactions);
 
   void connect(IDBDatabase*);
 
   // Returns a new WebIDBDatabaseCallbacks for this object. Must only be
   // called once.
   std::unique_ptr<WebIDBDatabaseCallbacks> createWebCallbacks();
   void detachWebCallbacks();
   void webCallbacksDestroyed();
 
  protected:
@@ skipping 11 matching lines @@
   WeakMember<IDBDatabase> m_database;
 
   // Pointer back to the WebIDBDatabaseCallbacks that holds a persistent
   // reference to this object.
   WebIDBDatabaseCallbacks* m_webCallbacks = nullptr;
 };
 
 }  // namespace blink
 
 #endif  // IDBDatabaseCallbacks_h