[IndexedDB] Refactoring to remove ref ptrs and host transaction ids.

content/browser/indexed_db/indexed_db_class_factory.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CLASS_FACTORY_H_
 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CLASS_FACTORY_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 29 matching lines @@
   static IndexedDBClassFactory* Get();
 
   static void SetIndexedDBClassFactoryGetter(GetterCallback* cb);
 
   virtual scoped_refptr<IndexedDBDatabase> CreateIndexedDBDatabase(
       const base::string16& name,
       scoped_refptr<IndexedDBBackingStore> backing_store,
       scoped_refptr<IndexedDBFactory> factory,
       const IndexedDBDatabase::Identifier& unique_identifier);
 
-  virtual IndexedDBTransaction* CreateIndexedDBTransaction(
+  virtual std::unique_ptr<IndexedDBTransaction> CreateIndexedDBTransaction(
       int64_t id,
-      base::WeakPtr<IndexedDBConnection> connection,
+      IndexedDBConnection* connection,
       const std::set<int64_t>& scope,
       blink::WebIDBTransactionMode mode,
       IndexedDBBackingStore::Transaction* backing_store_transaction);
 
   virtual std::unique_ptr<LevelDBIteratorImpl> CreateIteratorImpl(
       std::unique_ptr<leveldb::Iterator> iterator);
 
   virtual scoped_refptr<LevelDBTransaction> CreateLevelDBTransaction(
       LevelDBDatabase* db);
 
  protected:
   IndexedDBClassFactory() {}
   virtual ~IndexedDBClassFactory() {}
   friend struct base::DefaultLazyInstanceTraits<IndexedDBClassFactory>;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_CLASS_FACTORY_H_