Remove all uses of display:block and display:inline-block.

sky/tests/layout/position-absolute-pixels.sky

 <import src="../resources/run-after-display.sky" />
 
 <style>
   block, paragraph, flex {
     width: 100px;
     height: 100px;
     margin-bottom: 50px;
     /* Make it a positioning root. */
     transform: translate3d(0, 0, 0);
   }
   block { background: pink; }
   paragraph {
     background: orange;
     display: paragraph;
   }
   flex {
     background: salmon;
     display: flex;
+    flex-direction: row;
   }
   spacer {
     height: 30px;
     width: 30px;
     border: 5px solid purple;
     background: papayawhip;
   }
   absolute {
     position: absolute;
     width: 20px;
@@ skipping 24 matching lines @@
 import "dart:sky.internals" as internals;
 
 void main() {
   window.addEventListener("load", (_) {
     runAfterDisplay(() {
       internals.notifyTestComplete("");
     });
   });
 }
 </script>