void RenderCounter::destroyCounterNode(RenderObject* owner, const AtomicString& identifier)
{
CounterMap* map = counterMaps().get(owner);
if (!map)
return;
CounterMap::iterator mapIterator = map->find(identifier);
if (mapIterator == map->end())
return;
destroyCounterNodeWithoutMapRemoval(identifier, mapIterator->value.get());
map->remove(mapIterator);
// We do not delete "map" here even if empty because we expect to reuse
// it soon. In order for a renderer to lose all its counters permanently,
// a style change for the renderer involving removal of all counter
// directives must occur, in which case, RenderCounter::destroyCounterNodes()
// must be called.
// The destruction of the Renderer (possibly caused by the removal of its
// associated DOM node) is the other case that leads to the permanent
// destruction of all counters attached to a Renderer. In this case
// RenderCounter::destroyCounterNodes() must be and is now called, too.
// RenderCounter::destroyCounterNodes() handles destruction of the counter
// map associated with a renderer, so there is no risk in leaking the map.
}
