Unprefix usage of -webkit-transform in tests

LayoutTests/compositing/geometry/preserve-3d-switching.html

Index: LayoutTests/compositing/geometry/preserve-3d-switching.html
diff --git a/LayoutTests/compositing/geometry/preserve-3d-switching.html b/LayoutTests/compositing/geometry/preserve-3d-switching.html
index 83005a3c2927d7e90ec225ab55d0f10e14824078..8c610557ca2767bce8999e556125e63f005f14f0 100644
--- a/LayoutTests/compositing/geometry/preserve-3d-switching.html
+++ b/LayoutTests/compositing/geometry/preserve-3d-switching.html
@@ -24,7 +24,7 @@
       background-color: yellow;
       opacity: 0.8;
       -webkit-transform-style: preserve-3d;
-      -webkit-transform: rotateX(-60deg) rotateY(40deg);
+      transform: rotateX(-60deg) rotateY(40deg);
     }
     
     #parent > div {
@@ -42,7 +42,7 @@
     #parent > :first-child {
       background-color: green;
       opacity:0.7;
-      -webkit-transform: translateZ(50px) rotateY(-40deg);
+      transform: translateZ(50px) rotateY(-40deg);
     }
   </style>
   <script type="text/javascript" charset="utf-8">
@@ -75,7 +75,7 @@
   <p>The green box appear angled out from the yellow box and embedded in it.</p>
   <div id="container">
     <div id="parent">
-      <div>-webkit-transform: translateZ(-100px) rotateY(45deg);</div>
+      <div>transform: translateZ(-100px) rotateY(45deg);</div>
     </div>
     <div id="layerTree"></div>
   </div>