Port messages sent by WebIDBFactoryImpl to Mojo.

third_party/WebKit/Source/modules/indexeddb/IDBRequest.h

 /*
  * Copyright (C) 2010 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 67 matching lines @@
 
   // Requests made during index population are implementation details and so
   // events should not be visible to script.
   void preventPropagation() { m_preventPropagation = true; }
 
   // Defined in the IDL
   enum ReadyState { PENDING = 1, DONE = 2, EarlyDeath = 3 };
 
   const String& readyState() const;
 
+  // Returns a new WebIDBCallbacks for this request. Must only be called once.
+  std::unique_ptr<WebIDBCallbacks> createWebCallbacks();
+  void webCallbacksDestroyed();
+
   DEFINE_ATTRIBUTE_EVENT_LISTENER(success);
   DEFINE_ATTRIBUTE_EVENT_LISTENER(error);
 
   void setCursorDetails(IndexedDB::CursorType, WebIDBCursorDirection);
   void setPendingCursor(IDBCursor*);
   void abort();
 
   virtual void onError(DOMException*);
   virtual void onSuccess(const Vector<String>&);
   virtual void onSuccess(std::unique_ptr<WebIDBCursor>,
@@ skipping 18 matching lines @@
   }
   virtual void onSuccess(std::unique_ptr<WebIDBDatabase>,
                          const IDBDatabaseMetadata&) {
     ASSERT_NOT_REACHED();
   }
 
   // ScriptWrappable
   bool hasPendingActivity() const final;
 
   // ActiveDOMObject
-  void contextDestroyed() final;
+  void contextDestroyed() override;
 
   // EventTarget
   const AtomicString& interfaceName() const override;
   ExecutionContext* getExecutionContext() const final;
   void uncaughtExceptionInEventHandler() final;
 
   // 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").
   void transactionDidFinishAndDispatch();
@@ skipping 41 matching lines @@
   Member<IDBCursor> m_pendingCursor;
   // New state is not applied to the cursor object until the event is
   // dispatched.
   Member<IDBKey> m_cursorKey;
   Member<IDBKey> m_cursorPrimaryKey;
   RefPtr<IDBValue> m_cursorValue;
 
   bool m_didFireUpgradeNeededEvent = false;
   bool m_preventPropagation = false;
   bool m_resultDirty = true;
+
+  // Pointer back to the WebIDBCallbacks that holds a persistent reference to
+  // this object.
+  WebIDBCallbacks* m_webCallbacks = nullptr;
 };
 
 }  // namespace blink
 
 #endif  // IDBRequest_h