CSS Animations: Remove unnecessary webkit prefixes from layout tests

third_party/WebKit/LayoutTests/animations/matrix-anim.html

Index: third_party/WebKit/LayoutTests/animations/matrix-anim.html
diff --git a/third_party/WebKit/LayoutTests/animations/matrix-anim.html b/third_party/WebKit/LayoutTests/animations/matrix-anim.html
index 4f7cee8e508725aa9632c9d0327057da785a05b0..e3dd5ab33d70fba5e38cba1474c8bec8246fc483 100644
--- a/third_party/WebKit/LayoutTests/animations/matrix-anim.html
+++ b/third_party/WebKit/LayoutTests/animations/matrix-anim.html
@@ -10,11 +10,11 @@
       height: 100px;
       width: 100px;
       background-color: blue;
-      -webkit-animation-duration: 1s;
-      -webkit-animation-timing-function: linear;
-      -webkit-animation-name: anim;
+      animation-duration: 1s;
+      animation-timing-function: linear;
+      animation-name: anim;
     }
-    @-webkit-keyframes anim {
+    @keyframes anim {
         from { transform: matrix(0.707, -0.707, 0.707, 0.707, 0, 0); }
         to   { transform: matrix(0.707, 0.707, -0.707, 0.707, 0, 0); }
     }
@@ -25,7 +25,7 @@
     
     const expectedValues = [
       // [time, element-id, property, expected-value, tolerance]
-      [0.5, "box", "webkitTransform", [1,0,0,1,0,0], 0.1],
+      [0.5, "box", "transform", [1,0,0,1,0,0], 0.1],
     ];
     
     runAnimationTest(expectedValues);