Dispatch IndexedDB IPC messages to worker threads

content/renderer/renderer_webidbtransaction_impl.cc

 // Copyright (c) 2011 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.
 
 #include "content/renderer/renderer_webidbtransaction_impl.h"
 
 #include "content/common/indexed_db_messages.h"
 #include "content/renderer/indexed_db_dispatcher.h"
 #include "content/renderer/render_thread_impl.h"
 #include "content/renderer/renderer_webidbobjectstore_impl.h"
@@ skipping 50 matching lines @@
 {
   ChildThread::current()->Send(
       new IndexedDBHostMsg_TransactionDidCompleteTaskEvents(
           idb_transaction_id_));
 }
 
 void RendererWebIDBTransactionImpl::setCallbacks(
     WebIDBTransactionCallbacks* callbacks)
 {
   IndexedDBDispatcher* dispatcher =
-      RenderThreadImpl::current()->indexed_db_dispatcher();
+      IndexedDBDispatcher::ThreadSpecificInstance();
   dispatcher->RegisterWebIDBTransactionCallbacks(callbacks,
                                                  idb_transaction_id_);
 }