Oilpan: Prepare moving AXObject to heap

Source/modules/accessibility/AXARIAGrid.cpp

Index: Source/modules/accessibility/AXARIAGrid.cpp
diff --git a/Source/modules/accessibility/AXARIAGrid.cpp b/Source/modules/accessibility/AXARIAGrid.cpp
index 0d3349ac670a6ba9aded0d360c8b434d8106ede8..c87668f9054c1b3739cfbd59a15373dff076e09f 100644
--- a/Source/modules/accessibility/AXARIAGrid.cpp
+++ b/Source/modules/accessibility/AXARIAGrid.cpp
@@ -46,9 +46,9 @@ AXARIAGrid::~AXARIAGrid()
 {
 }
 
-PassRefPtr<AXARIAGrid> AXARIAGrid::create(LayoutObject* layoutObject, AXObjectCacheImpl* axObjectCache)
+PassRefPtrWillBeRawPtr<AXARIAGrid> AXARIAGrid::create(LayoutObject* layoutObject, AXObjectCacheImpl* axObjectCache)
 {
-    return adoptRef(new AXARIAGrid(layoutObject, axObjectCache));
+    return adoptRefWillBeNoop(new AXARIAGrid(layoutObject, axObjectCache));
 }
 
 bool AXARIAGrid::addTableCellChild(AXObject* child, HashSet<AXObject*>& appendedRows, unsigned& columnCount)
@@ -97,7 +97,7 @@ void AXARIAGrid::addChildren()
     // add only rows that are labeled as aria rows
     HashSet<AXObject*> appendedRows;
     unsigned columnCount = 0;
-    for (RefPtr<AXObject> child = firstChild(); child; child = child->nextSibling()) {
+    for (RefPtrWillBeRawPtr<AXObject> child = firstChild(); child; child = child->nextSibling()) {
 
         if (!addTableCellChild(child.get(), appendedRows, columnCount)) {