Implement `direction` property (#906)
1<test name="block_margin_auto_rtl__content_box_ltr" use-rounding="true">
2 <viewport width="max-content" height="max-content"/>
3 <input>
4 <div display="block" box-sizing="content-box" direction="rtl" width="100px">
5 <div box-sizing="content-box" direction="ltr" width="20px" height="10px" margin-left="auto"/>
6 <div box-sizing="content-box" direction="ltr" width="20px" height="10px" margin-right="auto"/>
7 <div box-sizing="content-box" direction="ltr" width="20px" height="10px" margin-left="auto" margin-right="auto"/>
8 </div>
9 </input>
10 <expectations>
11 <node x="0" y="0" width="100" height="30">
12 <node x="80" y="0" width="20" height="10"/>
13 <node x="0" y="10" width="20" height="10"/>
14 <node x="40" y="20" width="20" height="10"/>
15 </node>
16 </expectations>
17</test>