Unprefix usage of -webkit-transform in tests

LayoutTests/fast/dom/Range/getClientRects.html

 <script src="../../../resources/js-test.js"></script>
 <style>
 .bbox {
     position:absolute;
     outline: 5px solid rgba(255, 0, 0, .75);
     z-index: -1;
 }
 
 .box {
     width: 400px;
     line-height: 40px;
 }
 
 .outer {
     outline: 2px solid green;
 }
 
 .inner {
     display: inline-block;
     width: 40px;
     height: 20px;
     outline: 2px solid blue;
 }
 
 #test8 {
-    -webkit-transform: translate(50px, 100px) rotate(50deg);
+    transform: translate(50px, 100px) rotate(50deg);
 }
 
 #test10 {
     height: 400px;
     -webkit-writing-mode: vertical-lr;
 }
 
 #console {
     position:absolute;
     left: 500px;
@@ skipping 364 matching lines @@
     debug("Test 11");
     var range11 = document.createRange();
     rects = range11.getClientRects();
     shouldBe("rects.length", "0");
 
     if (window.testRunner) {
         var area = document.getElementById('testArea');
         area.parentNode.removeChild(area);
     }
 </script>