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

content/browser/indexed_db/indexed_db_backing_store.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_backing_store.h"
 
 #include <string>
 
 #include "base/file_util.h"
 #include "base/logging.h"
@@ skipping 2601 matching lines @@
 }
 
 IndexedDBBackingStore::Transaction::Transaction(
     IndexedDBBackingStore* backing_store)
     : backing_store_(backing_store) {}
 
 IndexedDBBackingStore::Transaction::~Transaction() {}
 
 void IndexedDBBackingStore::Transaction::begin() {
   IDB_TRACE("IndexedDBBackingStore::Transaction::begin");
-  DCHECK(!transaction_);
+  DCHECK(!transaction_.get());
   transaction_ = LevelDBTransaction::Create(backing_store_->db_.get());
 }
 
 bool IndexedDBBackingStore::Transaction::Commit() {
   IDB_TRACE("IndexedDBBackingStore::Transaction::commit");
-  DCHECK(transaction_);
+  DCHECK(transaction_.get());
   bool result = transaction_->Commit();
   transaction_ = NULL;
   if (!result)
     INTERNAL_WRITE_ERROR(TRANSACTION_COMMIT_METHOD);
   return result;
 }
 
 void IndexedDBBackingStore::Transaction::Rollback() {
   IDB_TRACE("IndexedDBBackingStore::Transaction::rollback");
-  DCHECK(transaction_);
+  DCHECK(transaction_.get());
   transaction_->Rollback();
   transaction_ = NULL;
 }
 
 }  // namespace content