Implement `direction` property (#906)
1<test name="flex_root_ignored__content_box_rtl" use-rounding="true">
2 <viewport width="max-content" height="max-content"/>
3 <input>
4 <div box-sizing="content-box" direction="rtl" flex-direction="column" width="100px" min-height="100px" max-height="500px">
5 <div box-sizing="content-box" direction="rtl" flex-grow="1" flex-basis="200px"/>
6 <div box-sizing="content-box" direction="rtl" height="100px"/>
7 </div>
8 </input>
9 <expectations>
10 <node x="0" y="0" width="100" height="300">
11 <node x="0" y="0" width="100" height="200"/>
12 <node x="0" y="200" width="100" height="100"/>
13 </node>
14 </expectations>
15</test>