Implement `direction` property (#906)
1<test name="gridflex_kitchen_sink_minimise2__content_box_ltr" use-rounding="true">
2 <viewport width="max-content" height="max-content"/>
3 <input>
4 <div box-sizing="content-box" direction="ltr" flex-grow="1" width="50px">
5 <div display="grid" box-sizing="content-box" direction="ltr" grid-template-rows="auto" grid-template-columns="auto">
6 <div box-sizing="content-box" direction="ltr" width="20px" height="20px"/>
7 </div>
8 </div>
9 </input>
10 <expectations>
11 <node x="0" y="0" width="50" height="20">
12 <node x="0" y="0" width="20" height="20">
13 <node x="0" y="0" width="20" height="20"/>
14 </node>
15 </node>
16 </expectations>
17</test>