Created attachment 212474 [details]
patch to delete the expected png(s) and to add the -expected.html file
When there's a <p> inside <div style="flow-into:flow">, the margins of the paragraph should collapse with the parent div but they don't.
The LayoutTests/fast/regions/flow-content-basic.html test can't be turned into a ref test.
The current expected png results are not correct.
This bug blocks bug #120457.
Created attachment 212542 [details]
test with regions
Created attachment 212543 [details]
html without regions
This bug is invalid because:
1. In CSS, the adjoining margins of two or more boxes (which might or might not be siblings) can combine to form a single margin. Two margins are adjoining if and only if both belong to in-flow block-level boxes that participate in the same block formatting context ( http://www.w3.org/TR/CSS2/box.html#collapsing-margins )
2. CSS Regions establish a new block formatting Context. ( http://dev.w3.org/csswg/css-regions/ )