Call scoped_refptr<T>::get() rather than relying on implicit "operator T*"

content/browser/indexed_db/indexed_db_transaction.cc

 // Copyright (c) 2013 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/browser/indexed_db/indexed_db_transaction.h"
 
 #include <vector>
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/browser/indexed_db/indexed_db_backing_store.h"
@@ skipping 142 matching lines @@
 
   // Transactions must also be marked as completed before the
   // front-end is notified, as the transaction completion unblocks
   // operations like closing connections.
   database_->transaction_coordinator().DidFinishTransaction(this);
 #ifndef NDEBUG
   DCHECK(!database_->transaction_coordinator().IsActive(this));
 #endif
   database_->TransactionFinished(this);
 
-  if (callbacks_)
+  if (callbacks_.get())
     callbacks_->OnAbort(id_, error);
 
   database_->TransactionFinishedAndAbortFired(this);
 
   database_ = NULL;
 }
 
 bool IndexedDBTransaction::IsTaskQueueEmpty() const {
   return preemptive_task_queue_.empty() && task_queue_.empty();
 }
@@ skipping 123 matching lines @@
 
 void IndexedDBTransaction::CloseOpenCursors() {
   for (std::set<IndexedDBCursor*>::iterator i = open_cursors_.begin();
        i != open_cursors_.end();
        ++i)
     (*i)->Close();
   open_cursors_.clear();
 }
 
 }  // namespace content