Unprefix usage of -webkit-transform in tests

LayoutTests/transforms/transform-focus-ring-repaint.html

Index: LayoutTests/transforms/transform-focus-ring-repaint.html
diff --git a/LayoutTests/transforms/transform-focus-ring-repaint.html b/LayoutTests/transforms/transform-focus-ring-repaint.html
index 867a9992ec7d3e7434b0538c870e14e89a3bb9cf..7f73c100d6d1dc1801279e490f106c4f91476b2f 100644
--- a/LayoutTests/transforms/transform-focus-ring-repaint.html
+++ b/LayoutTests/transforms/transform-focus-ring-repaint.html
@@ -10,7 +10,7 @@ onload = runRepaintTest;
 Result repaint rects should cover the whole focus ring.
 </div>
 <div id="target" style="backface-visibility: hidden; width: 200px; height: 200px; background-color: yellow">
-    <div style="-webkit-transform: rotate(90deg); position: absolute; top: 100px; left: 100px; background-color: blue; width: 300px; height: 300px">
+    <div style="transform: rotate(90deg); position: absolute; top: 100px; left: 100px; background-color: blue; width: 300px; height: 300px">
         <div style="position: absolute; top: 100px; left: 40px; background-color: green; width: 400px; height: 100px"></div>
     </div>
 </div>