Convert some repaint tests into ref tests

third_party/WebKit/LayoutTests/fast/repaint/border-image-outset-add-repaint-expected.html

Index: third_party/WebKit/LayoutTests/fast/repaint/border-image-outset-add-repaint-expected.html
diff --git a/third_party/WebKit/LayoutTests/fast/repaint/border-image-outset-add-repaint.html b/third_party/WebKit/LayoutTests/fast/repaint/border-image-outset-add-repaint-expected.html
similarity index 53%
copy from third_party/WebKit/LayoutTests/fast/repaint/border-image-outset-add-repaint.html
copy to third_party/WebKit/LayoutTests/fast/repaint/border-image-outset-add-repaint-expected.html
index 7ef7f65e36060c7f731ddad3218d3323ab0c1114..608c15d692fe67c2e4787bdbda9ff5858537dc9a 100644
--- a/third_party/WebKit/LayoutTests/fast/repaint/border-image-outset-add-repaint.html
+++ b/third_party/WebKit/LayoutTests/fast/repaint/border-image-outset-add-repaint-expected.html
@@ -7,18 +7,9 @@
         display: inline-block;
         border-image-source: url("../borders/resources/border-image.png");
         border-image-slice: 21 30 30 21 fill;
-        border-image-width: 1;
+        border-image-width: 5;
     }
 </style>
-<script src="resources/text-based-repaint.js"></script>
-<script>
-    function repaintTest()
-    {
-        // Adding border-image-outset will cause a repaint but no layout.
-        document.getElementById("test").style['border-image-outset'] = '5';
-    }
-    window.onload = runRepaintTest;
-</script>
 <div id="test"></div>
 <p>
 Tests the repainting of border-image-outset when added.