Port messages sent by WebIDBFactoryImpl to Mojo.

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 16 matching lines @@
 #define IDBDatabaseCallbacks_h
 
 #include "modules/ModulesExport.h"
 #include "platform/heap/Handle.h"
 #include "wtf/PassRefPtr.h"
 
 namespace blink {
 
 class DOMException;
 class IDBDatabase;
+class WebIDBDatabaseCallbacks;
 
 class MODULES_EXPORT IDBDatabaseCallbacks : public GarbageCollectedFinalized<IDBDatabaseCallbacks> {
 public:
     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);
 
     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:
     // Exposed to subclasses for unit tests.
     IDBDatabaseCallbacks();
 
 private:
     // The initial IDBOpenDBRequest, final IDBDatabase, and/or
     // WebIDBDatabaseCallbacks have strong references to an IDBDatabaseCallbacks
     // object.
     // Oilpan: We'd like to delete an IDBDatabase object by a
     // GC. WebIDBDatabaseCallbacks can survive the GC, and IDBDatabaseCallbacks
     // can survive too. m_database should be a weak reference to avoid that an
     // IDBDatabase survives the GC with the IDBDatabaseCallbacks.
     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