Treat % as 0 for the min-content contribution of replaced elements (#32103)

`width` and `max-width` typically treat expressions with percentages as
their initial value, but for the min-content contribution of replaced
elements, they should instead be treated as zero.

https://drafts.csswg.org/css-sizing-3/#replaced-percentage-min-contribution

Signed-off-by: Oriol Brufau <obrufau@igalia.com>

components/layout_2020/flow/mod.rs

@@ -431,6 +431,7 @@ fn compute_inline_content_sizes_for_block_level_boxes(
                     containing_block,
                     &LogicalVec2::zero(),
                     false, /* auto_block_size_stretches_to_containing_block */
+                    false, /* is_replaced */
                     false, /* is_table */
                     !matches!(base.style.pseudo(), Some(PseudoElement::ServoAnonymousBox)),
                     |_| None, /* TODO: support preferred aspect ratios on non-replaced boxes */