Andreas Kling 6f0d7245d7 LibWeb: Allow Document::ref() when ref-count is zero ...

DOM::Document has some special lifetime rules to support the DOM
lifetime semantics expected on the web. Any DOM node will keep its
document alive as well, even after the document's ref-count has reached
zero. This is achieved by the Document::m_referencing_node_count
counter.

Because of this mechanism, we can't VERIFY(m_ref_count) in TreeNode
where T may be a DOM::Document.

2021-10-03 16:42:34 +02:00

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