pub fn publish_empty_retained_ledger()Expand description
Publish the EMPTY ledger — what a surface destroy or a device-scale change
leaves the renderer holding. A shell calls it (or publish_retained_ledger
with the renderer’s own, equally empty, ledger) before a destroy returns or
its barrier is acknowledged, so the UI thread’s first paint over a
re-created surface names no page the torn-down one held.