new_ComputedTextBlock_needs_rerender_parameters.md

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title: "New ComputedTextBlock::needs_rerender parameters"
pull_requests: [22614]

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ComputedTextBlock::needs_rerender takes two new bool parameters: is_viewport_size_changed and is_rem_size_changed.

is_viewport_size_changed should be true if the local viewport size has changed this frame, and is_rem_size_changed should be true if the rem size (probably corresponding to the value of the RemSize resource) has changed this frame.