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

Source/modules/webdatabase/SQLTransactionBackend.cpp

Index: Source/modules/webdatabase/SQLTransactionBackend.cpp
diff --git a/Source/modules/webdatabase/SQLTransactionBackend.cpp b/Source/modules/webdatabase/SQLTransactionBackend.cpp
index 2349bdb8f2e8556f1d03585081ad745cda2e91f8..8f378c94254a2c3615bee88b82b14449abc984b2 100644
--- a/Source/modules/webdatabase/SQLTransactionBackend.cpp
+++ b/Source/modules/webdatabase/SQLTransactionBackend.cpp
@@ -340,10 +340,10 @@
 
 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,
@@ -370,6 +370,12 @@ SQLTransactionBackend::~SQLTransactionBackend()
     ASSERT(!m_sqliteTransaction);
 }
 
+void SQLTransactionBackend::trace(Visitor* visitor)
+{
+    visitor->trace(m_frontend);
+    visitor->trace(m_database);
+}
+
 void SQLTransactionBackend::doCleanup()
 {
     if (!m_frontend)