Unprefix usage of -webkit-transform in tests

LayoutTests/fast/transforms/matrix-with-zoom.html

Index: LayoutTests/fast/transforms/matrix-with-zoom.html
diff --git a/LayoutTests/fast/transforms/matrix-with-zoom.html b/LayoutTests/fast/transforms/matrix-with-zoom.html
index 52b70e5bc2abda2d65cd1394c9b0572b37d9f42c..90b0a212d592d03d13053df466a9d17f0e94d469 100644
--- a/LayoutTests/fast/transforms/matrix-with-zoom.html
+++ b/LayoutTests/fast/transforms/matrix-with-zoom.html
@@ -17,12 +17,12 @@ body {
 }
 
 .translate {
-    -webkit-transform: translate(100px, 50px);
+    transform: translate(100px, 50px);
     background-color: red;
 }
 
 .matrix {
-    -webkit-transform: matrix(1, 0, 0, 1, 100, 50);
+    transform: matrix(1, 0, 0, 1, 100, 50);
     background-color: green;
 }
 </style>