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