Unprefix usage of -webkit-transform in tests

LayoutTests/animations/3d/transform-perspective.html

Index: LayoutTests/animations/3d/transform-perspective.html
diff --git a/LayoutTests/animations/3d/transform-perspective.html b/LayoutTests/animations/3d/transform-perspective.html
index 768c120fbdea199c39c8b8b835af66c056fb0a1f..1d83d4caa97aa041f76c297cf8e4299475476f56 100644
--- a/LayoutTests/animations/3d/transform-perspective.html
+++ b/LayoutTests/animations/3d/transform-perspective.html
@@ -18,13 +18,13 @@
     }
 
     @-webkit-keyframes anim {
-        from { -webkit-transform: perspective(100px); }
-        to   { -webkit-transform: perspective(200px); }
+        from { transform: perspective(100px); }
+        to   { transform: perspective(200px); }
     }
 
     @-webkit-keyframes anim2 {
-        from { -webkit-transform: perspective(1000px); }
-        to   { -webkit-transform: none; }
+        from { transform: perspective(1000px); }
+        to   { transform: none; }
     }
   </style>
   <script src="../resources/animation-test-helpers.js" type="text/javascript"></script>