Oilpan: Prepare to move AbstractSQLTransaction and SQLTransaction to Oilpan heap.

Source/modules/webdatabase/SQLTransaction.cpp

Index: Source/modules/webdatabase/SQLTransaction.cpp
diff --git a/Source/modules/webdatabase/SQLTransaction.cpp b/Source/modules/webdatabase/SQLTransaction.cpp
index c3d64a81f67dcd1ad70ab16b4d996f0f343b1f5d..b6b0ec392319de37a1569b4564aa044ad86aee56 100644
--- a/Source/modules/webdatabase/SQLTransaction.cpp
+++ b/Source/modules/webdatabase/SQLTransaction.cpp
@@ -48,11 +48,11 @@
 
 namespace WebCore {
 
-PassRefPtr<SQLTransaction> SQLTransaction::create(Database* db, PassOwnPtr<SQLTransactionCallback> callback,
+PassRefPtrWillBeRawPtr<SQLTransaction> SQLTransaction::create(Database* db, PassOwnPtr<SQLTransactionCallback> callback,
     PassOwnPtr<VoidCallback> successCallback, PassOwnPtr<SQLTransactionErrorCallback> errorCallback,
     bool readOnly)
 {
-    return adoptRef(new SQLTransaction(db, callback, successCallback, errorCallback, readOnly));
+    return adoptRefWillBeNoop(new SQLTransaction(db, callback, successCallback, errorCallback, readOnly));
 }
 
 SQLTransaction::SQLTransaction(Database* db, PassOwnPtr<SQLTransactionCallback> callback,
@@ -69,6 +69,11 @@ SQLTransaction::SQLTransaction(Database* db, PassOwnPtr<SQLTransactionCallback>
     ScriptWrappable::init(this);
 }
 
+void SQLTransaction::trace(Visitor* visitor)
+{
+    visitor->trace(m_database);
+}
+
 bool SQLTransaction::hasCallback() const
 {
     return m_callbackWrapper.hasCallback();