// as being in the top layer.
const Element* ancestor = topLayerAncestor(element);
Document* document = parentFrameView->frame().document();
- const Vector<RefPtr<Element> >& elements = document->topLayerElements();
+ const WillBeHeapVector<RefPtrWillBeMember<Element> >& elements = document->topLayerElements();
size_t start = ancestor ? elements.find(ancestor) + 1 : 0;
for (size_t i = start; i < elements.size(); ++i)
addTreeToOcclusions(elements[i]->renderer(), frameRect, occlusions);