Rework dispatchEvent so it is consistent for isTrusted support.

Source/modules/indexeddb/IDBRequest.h

Index: Source/modules/indexeddb/IDBRequest.h
diff --git a/Source/modules/indexeddb/IDBRequest.h b/Source/modules/indexeddb/IDBRequest.h
index 5dceb8f8f2708a8282d7ef90911056ef025f5e07..312b62c9345de500cb9c679f7b3498f76612d78d 100644
--- a/Source/modules/indexeddb/IDBRequest.h
+++ b/Source/modules/indexeddb/IDBRequest.h
@@ -118,9 +118,6 @@ public:
     ExecutionContext* executionContext() const final;
     void uncaughtExceptionInEventHandler() final;
 
-    using EventTarget::dispatchEvent;
-    bool dispatchEvent(PassRefPtrWillBeRawPtr<Event>) override;
-
     // Called by a version change transaction that has finished to set this
     // request back from DONE (following "upgradeneeded") back to PENDING (for
     // the upcoming "success" or "error").
@@ -136,6 +133,9 @@ protected:
     void onSuccessInternal(IDBAny*);
     void setResult(IDBAny*);
 
+    // EventTarget
+    bool dispatchEventInternal(PassRefPtrWillBeRawPtr<Event>) override;
+
     bool m_contextStopped;
     Member<IDBTransaction> m_transaction;
     ReadyState m_readyState;