CSS Animations: Remove unnecessary webkit prefixes from layout tests

third_party/WebKit/LayoutTests/animations/animation-direction.html

Index: third_party/WebKit/LayoutTests/animations/animation-direction.html
diff --git a/third_party/WebKit/LayoutTests/animations/animation-direction.html b/third_party/WebKit/LayoutTests/animations/animation-direction.html
index 46fbb0766bb8a5b5b7f52d37c472ed0f68d6ead7..be2cbca1af541686be9f9ba8dbdb7d3a70a3c59e 100644
--- a/third_party/WebKit/LayoutTests/animations/animation-direction.html
+++ b/third_party/WebKit/LayoutTests/animations/animation-direction.html
@@ -16,14 +16,14 @@
       height: 100px;
       width: 100px;
       background-color: blue;
-      -webkit-animation-name: move;
-      -webkit-animation-duration: 2s;
-      -webkit-animation-direction: alternate;
-      -webkit-animation-iteration-count: 2;
-      -webkit-animation-timing-function: linear;
+      animation-name: move;
+      animation-duration: 2s;
+      animation-direction: alternate;
+      animation-iteration-count: 2;
+      animation-timing-function: linear;
     }
 
-    @-webkit-keyframes move {
+    @keyframes move {
       0%   {
         left: 0;
       }