Avoid recomputing inline_content_sizes() when not needed (#33806)

The result of `inline_content_sizes()` may depend on the block size of
the containing block, so we were always recomputing in case we got
a different block size.

However, if no content has a vertical percentage or stretches vertically,
then we don't need to recompute: the result will be the same anyways.

Signed-off-by: Oriol Brufau <obrufau@igalia.com>
Co-authored-by: Martin Robinson <mrobinson@igalia.com>

components/layout_2020/flexbox/construct.rs

@@ -171,7 +171,7 @@ where
                     let non_replaced = NonReplacedFormattingContext {
                         base_fragment_info: info.into(),
                         style: info.style.clone(),
-                        content_sizes: None,
+                        content_sizes_result: None,
                         contents: NonReplacedFormattingContextContents::Flow(
                             block_formatting_context,
                         ),