Unprefix usage of -webkit-transform in tests

LayoutTests/transitions/start-transform-transition.html

Index: LayoutTests/transitions/start-transform-transition.html
diff --git a/LayoutTests/transitions/start-transform-transition.html b/LayoutTests/transitions/start-transform-transition.html
index 44915b527e3cb68e07150753b4017e60d942c243..fd50957651d8a98a614a585bd1934a88c4f284e9 100644
--- a/LayoutTests/transitions/start-transform-transition.html
+++ b/LayoutTests/transitions/start-transform-transition.html
@@ -6,13 +6,13 @@
       width: 100px;
       height: 100px;
       background-color: blue;
-      -webkit-transition-property: -webkit-transform;
+      -webkit-transition-property: transform;
       -webkit-transition-duration: 5s;
-      -webkit-transform: translate(0, 0);
+      transform: translate(0, 0);
     }
 
     .moved {
-      -webkit-transform: translateX(300px);
+      transform: translateX(300px);
     }
   </style>
   <script>
@@ -52,4 +52,4 @@
   <div id="result">
   </div>
 </body>
-</html>
+</html>