[CSS Grid Layout] New alignment related repaint layout tests.

LayoutTests/fast/repaint/justify-self-overflow-change.html

Index: LayoutTests/fast/repaint/justify-self-overflow-change.html
diff --git a/LayoutTests/fast/repaint/justify-self-overflow-change.html b/LayoutTests/fast/repaint/justify-self-overflow-change.html
index 3d08598d3de06c2e1009b3ecbceee786a9da3066..20ea8d2f571fe3ef4f0c738d666e7c7f614a0aa5 100644
--- a/LayoutTests/fast/repaint/justify-self-overflow-change.html
+++ b/LayoutTests/fast/repaint/justify-self-overflow-change.html
@@ -3,6 +3,7 @@
 <script>
 function repaintTest() {
   document.getElementsByClassName('item1')[0].style.justifySelf = 'end safe';
+  document.getElementsByClassName('item2')[0].style.justifySelf = 'end safe';
 }
 onload = runRepaintTest;
 </script>
@@ -12,8 +13,7 @@ body {
 }
 #container {
   display: grid;
-  grid: 100px 100px / 150px 150px;
-  justify-items: end true;
+  grid: 100px 100px / 300px;
   width: 200px;
   height: 300px;
   background-color: red;
@@ -21,15 +21,15 @@ body {
 .item1 {
   grid-row: 1;
   grid-column: 1;
+  justify-self: end true;
   background-color: green;
-  border: solid thin blue;
   width: 150px;
 }
 .item2 {
   grid-row: 1;
   grid-column: 2;
   background-color: green;
-  border: solid thin blue;
+  justify-self: end true;
   width: 50px;
 </style>
 <p style="height: 20px">Tests invalidation on justify-self style change. Passes if there is no red.</p>