Unprefix usage of -webkit-transform in tests

LayoutTests/animations/animation-shorthand-overriding.html

Index: LayoutTests/animations/animation-shorthand-overriding.html
diff --git a/LayoutTests/animations/animation-shorthand-overriding.html b/LayoutTests/animations/animation-shorthand-overriding.html
index 7b27164d579426a575498f69cdac9ddd1f7aa0c4..e254a513ed1974dcd70a91cb7f76ee57dfa9c2ae 100644
--- a/LayoutTests/animations/animation-shorthand-overriding.html
+++ b/LayoutTests/animations/animation-shorthand-overriding.html
@@ -3,12 +3,12 @@
 <title>Test animation shorthand property</title> 
 <style type="text/css">
 @-webkit-keyframes circle {    
-    from { -webkit-transform:rotate(0deg); }    
-    to { -webkit-transform:rotate(360deg); }
+    from { transform:rotate(0deg); }    
+    to { transform:rotate(360deg); }
 }
 @-webkit-keyframes inner-circle {
-    from { -webkit-transform:rotate(0deg); }
-    to { -webkit-transform:rotate(-360deg); }
+    from { transform:rotate(0deg); }
+    to { transform:rotate(-360deg); }
 }
 
 div > div {