Unprefix usage of -webkit-transform in tests

LayoutTests/fast/css/transform-default-parameter.html

Index: LayoutTests/fast/css/transform-default-parameter.html
diff --git a/LayoutTests/fast/css/transform-default-parameter.html b/LayoutTests/fast/css/transform-default-parameter.html
index eab6b0bf0b638cc28bf6df59ee4a5ce8d0ba7cb5..6c4b2b027fc74a6a3320d4058b8ca20b05d4ec32 100644
--- a/LayoutTests/fast/css/transform-default-parameter.html
+++ b/LayoutTests/fast/css/transform-default-parameter.html
@@ -17,21 +17,21 @@
         top: 100px;
         left: 100px;
         background-color: blue;
-        -webkit-transform: translate(400px); // this should evaluate as 400px, 0px
+        transform: translate(400px); // this should evaluate as 400px, 0px
       }
 
       #box2 {
         top: 500px;
         left: 500px;
         background-color: green;
-        -webkit-transform: translate3d(0px, 0px, -1px);
+        transform: translate3d(0px, 0px, -1px);
       }
 
       #box3 {
         top: 100px;
         left: 500px;
         background-color: red;
-        -webkit-transform: translate3d(0px, 0px, -1px);
+        transform: translate3d(0px, 0px, -1px);
       }
       
     </style>