Inline nodes in our layout tree have a position, so let's show it. By
centralizing the logic for this, block nodes now lose their redundant
'content-size' dump info which is already part of the box model dump.
We were always creating an anonymous container for the inline contents
of table cells, but the layout node we spawn for the table cells
themselves already is capable of dealing with inline nodes. Regular
logic should kick in for dealing with the block/inline node invariant.
We were only dumping a PaintableBox' dimensions if its layout node was a
Layout::Box as well, causing us to not dump the dimensions of paintables
for inline nodes in the paintable tree.
Browsers such as Chrome and Firefox apply an arbitrary scale to the
current font size if `normal` is used for `line-height`. Firefox uses
1.2 while Chrome uses 1.15. Let's go with the latter for now, it's
relatively easy to change if we ever want to go back on that decision.
This also requires updating the expectations for a lot of layout tests.
The upside of this is that it's a bit easier to compare our layout
results to other browsers', especially Chrome.
This essentially reverts 1b46a52cfc
and adds more tests.
The reverted change was an incorrect workaround for the real issue,
which was that we weren't creating anonymous wrapper boxes around inline
children of table-cell boxes.
Now that this has been fixed, we can go back to aligning text properly.
