Oilpan: Prepare to move AbstractSQLTransactionBackend, SQLTransactionBackend, and SQLTransactionCoo…

Source/modules/webdatabase/SQLTransactionBackend.cpp

 /*
  * Copyright (C) 2007, 2008, 2013 Apple 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 322 matching lines @@
 //       notifyDatabaseThreadIsShuttingDown().
 //
 //     Phase 5: After state CleanupAndTerminate
 //
 //     - This is how a transaction ends normally.
 //     - state CleanupAndTerminate calls doCleanup().
 
 
 namespace WebCore {
 
-PassRefPtr<SQLTransactionBackend> SQLTransactionBackend::create(DatabaseBackend* db,
+PassRefPtrWillBeRawPtr<SQLTransactionBackend> SQLTransactionBackend::create(DatabaseBackend* db,
     PassRefPtrWillBeRawPtr<AbstractSQLTransaction> frontend, PassRefPtr<SQLTransactionWrapper> wrapper, bool readOnly)
 {
-    return adoptRef(new SQLTransactionBackend(db, frontend, wrapper, readOnly));
+    return adoptRefWillBeNoop(new SQLTransactionBackend(db, frontend, wrapper, readOnly));
 }
 
 SQLTransactionBackend::SQLTransactionBackend(DatabaseBackend* db,
     PassRefPtrWillBeRawPtr<AbstractSQLTransaction> frontend, PassRefPtr<SQLTransactionWrapper> wrapper, bool readOnly)
     : m_frontend(frontend)
     , m_database(db)
     , m_wrapper(wrapper)
     , m_hasCallback(m_frontend->hasCallback())
     , m_hasSuccessCallback(m_frontend->hasSuccessCallback())
     , m_hasErrorCallback(m_frontend->hasErrorCallback())
     , m_shouldRetryCurrentStatement(false)
     , m_modifiedDatabase(false)
     , m_lockAcquired(false)
     , m_readOnly(readOnly)
     , m_hasVersionMismatch(false)
 {
     ASSERT(m_database);
     m_frontend->setBackend(this);
     m_requestedState = SQLTransactionState::AcquireLock;
 }
 
 SQLTransactionBackend::~SQLTransactionBackend()
 {
     ASSERT(!m_sqliteTransaction);
 }
 
+void SQLTransactionBackend::trace(Visitor* visitor)
+{
+    visitor->trace(m_frontend);
+    visitor->trace(m_database);
+}
+
 void SQLTransactionBackend::doCleanup()
 {
     if (!m_frontend)
         return;
     m_frontend = nullptr; // Break the reference cycle. See comment about the life-cycle above.
 
     ASSERT(database()->databaseContext()->databaseThread()->isDatabaseThread());
 
     MutexLocker locker(m_statementMutex);
     m_statementQueue.clear();
@@ skipping 429 matching lines @@
 }
 
 SQLTransactionState SQLTransactionBackend::sendToFrontendState()
 {
     ASSERT(m_nextState != SQLTransactionState::Idle);
     m_frontend->requestTransitToState(m_nextState);
     return SQLTransactionState::Idle;
 }
 
 } // namespace WebCore