Replace IDBPendingTransactionMonitor with end-of-recursion-scope tasks

Source/modules/indexeddb/InspectorIndexedDBAgent.cpp

 /*
  * Copyright (C) 2012 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 160 matching lines @@
 
         IDBOpenDBRequest* idbOpenDBRequest = static_cast<IDBOpenDBRequest*>(event->target());
         IDBAny* requestResult = idbOpenDBRequest->resultAsAny();
         if (requestResult->type() != IDBAny::IDBDatabaseType) {
             m_executableWithDatabase->requestCallback()->sendFailure("Unexpected result type.");
             return;
         }
 
         IDBDatabase* idbDatabase = requestResult->idbDatabase();
         m_executableWithDatabase->execute(idbDatabase);
-        V8PerIsolateData::from(m_executableWithDatabase->scriptState()->isolate())->ensureIDBPendingTransactionMonitor()->deactivateNewTransactions();
+        V8PerIsolateData::from(m_executableWithDatabase->scriptState()->isolate())->runEndOfScopeTasks();
         idbDatabase->close();
     }
 
 private:
     OpenDatabaseCallback(ExecutableWithDatabase* executableWithDatabase)
         : EventListener(EventListener::CPPEventListenerType)
         , m_executableWithDatabase(executableWithDatabase) { }
     RefPtr<ExecutableWithDatabase> m_executableWithDatabase;
 };
 
@@ skipping 592 matching lines @@
     clearObjectStore->start(idbFactory, document->securityOrigin(), databaseName);
 }
 
 void InspectorIndexedDBAgent::trace(Visitor* visitor)
 {
     visitor->trace(m_page);
     InspectorBaseAgent::trace(visitor);
 }
 
 } // namespace blink