[css-flex] Change expectations of two aspect-ratio tests

New expectations incorporate an item's min-intrinsic size as part of
flex's automatic minimum sizing.

The new expectations are arguably what the spec currently calls for AND
what the spec authors originally intended AND are consistent with both
relevant proposals in w3c/csswg-drafts#6794

Also discussed at
web-platform-tests/interop#139 (comment)

Change-Id: I3c6ecdf66fbb4ee745c88b6b2a4dbecfb9913908

css/css-sizing/aspect-ratio/flex-aspect-ratio-002.html

@@ -10,9 +10,9 @@
 
 <div style="display: flex;">
   <!-- No transferred size suggestion since the flex item is non-replaced.
-       Content size suggestion is 50px because 50px is item's min-content size. -->
+       Content size suggestion is 100px because min-intrinsic width is 100px.
+  -->
   <div style="background: green; height: 100px; aspect-ratio: 1/2; flex-basis: 0;">
     <div style="width: 100px;"></div>
   </div>
-  <div style="background: green; height: 100px; width: 50px;"></div>
 </div>

css/css-sizing/aspect-ratio/flex-aspect-ratio-004.html

@@ -8,10 +8,9 @@
 
 <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
 
-<div style="background: green; width: 100px; height:50px;"></div>
 <div style="display: flex; flex-direction: column;">
   <!-- No transferred size suggestion since the flex item is non-replaced.
-       Content size suggestion is 50px because min-content size is 50px. -->
+       Content size suggestion is 100px because min-intrinsic height is 100px. -->
   <div style="background: green; width: 100px; aspect-ratio: 2/1; flex-basis: 0;">
     <div style="height: 100px;"></div>
   </div>