Add more cases of box-sizing change

LayoutTests/fast/repaint/box-sizing.html

Index: LayoutTests/fast/repaint/box-sizing.html
diff --git a/LayoutTests/fast/repaint/box-sizing.html b/LayoutTests/fast/repaint/box-sizing.html
index bcc83feaf478ac70a76ad4859704ba6815fe426b..7ebea8bf61f40617208c0243d9f8b684778bc004 100644
--- a/LayoutTests/fast/repaint/box-sizing.html
+++ b/LayoutTests/fast/repaint/box-sizing.html
@@ -3,7 +3,8 @@
 <script>
 function repaintTest()
 {
-    document.getElementById('target').style.boxSizing = 'content-box';
+    document.getElementById('target1').className = 'content-box';
+    document.getElementById('target2').className = 'border-box';
 }
 window.onload = runRepaintTest;
 </script>
@@ -11,12 +12,19 @@ window.onload = runRepaintTest;
 body {
     margin: 0;
 }
-#target {
-    border: solid blue 20px;
+div {
     width: 50%;
     height: 100px;
-    box-sizing: border-box;
     position: absolute;
+    background-color: green;
+    border: blue solid 20px;
+}
+.border-box {
+    box-sizing: border-box;
+}
+.content-box {
+    box-sizing: content-box;
 }
 </style>
-<div id="target"></div>
+<div id="target1" class="border-box" style="top: 0px"></div>
+<div id="target2" class="content-box" style="top: 200px"></div>