Layout support for new ellipse shape syntax

LayoutTests/css3/masking/clip-path-animation.html

Index: LayoutTests/css3/masking/clip-path-animation.html
diff --git a/LayoutTests/css3/masking/clip-path-animation.html b/LayoutTests/css3/masking/clip-path-animation.html
index 8cab6192515a53dab73150b6b63742c314016436..2124894f7fad438a075a357156a2a2822a5be227 100644
--- a/LayoutTests/css3/masking/clip-path-animation.html
+++ b/LayoutTests/css3/masking/clip-path-animation.html
@@ -39,8 +39,8 @@
     }
 
     @-webkit-keyframes ellipse-anim {
-        from { -webkit-clip-path: ellipse(50%, 50%, 50%, 40%); }
-        to   { -webkit-clip-path: ellipse(20%, 20%, 20%, 20%); }
+        from { -webkit-clip-path: ellipse(50% 40% at 50% 50%); }
+        to   { -webkit-clip-path: ellipse(20% 20% at 20% 20%); }
     }
 
     @-webkit-keyframes polygon-anim {
@@ -55,7 +55,7 @@
       // [time, element-id, property, expected-value, tolerance]
       [1, "rectangle-box", "webkitClipPath", "rectangle(10%, 10%, 80%, 80%, 0px, 0px)", 0.05],
       [1, "circle-box", "webkitClipPath", "circle(35% at 35% 35%)", 0.05],
-      [1, "ellipse-box", "webkitClipPath", "ellipse(35%, 35%, 35%, 30%)", 0.05],
+      [1, "ellipse-box", "webkitClipPath", "ellipse(35% 30% at 35% 35%)", 0.05],
       [1, "polygon-box", "webkitClipPath", "polygon(nonzero, 10% 10%, 90% 10%, 90% 90%, 10% 90%)", 0.05],
     ];