Oilpan: move custom element objects to the heap.

Source/core/dom/custom/CustomElementMicrotaskImportStep.cpp

Index: Source/core/dom/custom/CustomElementMicrotaskImportStep.cpp
diff --git a/Source/core/dom/custom/CustomElementMicrotaskImportStep.cpp b/Source/core/dom/custom/CustomElementMicrotaskImportStep.cpp
index 39f6bd2a10d7da687751409d43a631b23e0c67df..feeca1d7e2091e958d3bb2918ca2dee6013d91b4 100644
--- a/Source/core/dom/custom/CustomElementMicrotaskImportStep.cpp
+++ b/Source/core/dom/custom/CustomElementMicrotaskImportStep.cpp
@@ -39,9 +39,9 @@
 
 namespace WebCore {
 
-PassOwnPtr<CustomElementMicrotaskImportStep> CustomElementMicrotaskImportStep::create(HTMLImportChild* import)
+PassOwnPtrWillBeRawPtr<CustomElementMicrotaskImportStep> CustomElementMicrotaskImportStep::create(HTMLImportChild* import)
 {
-    return adoptPtr(new CustomElementMicrotaskImportStep(import));
+    return adoptPtrWillBeNoop(new CustomElementMicrotaskImportStep(import));
 }
 
 CustomElementMicrotaskImportStep::CustomElementMicrotaskImportStep(HTMLImportChild* import)
@@ -96,6 +96,12 @@ bool CustomElementMicrotaskImportStep::needsProcessOrStop() const
     return shouldStopProcessing() || m_queue->needsProcessOrStop();
 }
 
+void CustomElementMicrotaskImportStep::trace(Visitor* visitor)
+{
+    visitor->trace(m_queue);
+    CustomElementMicrotaskStep::trace(visitor);
+}
+
 #if !defined(NDEBUG)
 void CustomElementMicrotaskImportStep::show(unsigned indent)
 {