Remove the webkit prefix from idl properties and interfaces.

sky/engine/core/dom/Document.idl

Index: sky/engine/core/dom/Document.idl
diff --git a/sky/engine/core/dom/Document.idl b/sky/engine/core/dom/Document.idl
index cef99d8c7f5d512328bc48f17da793f0deaf37b8..4c93a94e5b56e34a832c4f2660aff01db8026c73 100644
--- a/sky/engine/core/dom/Document.idl
+++ b/sky/engine/core/dom/Document.idl
@@ -81,10 +81,10 @@ typedef (CanvasRenderingContext2D or WebGLRenderingContext) RenderingContext;
                                              [Default=Undefined] optional double pageY,
                                              [Default=Undefined] optional double screenX,
                                              [Default=Undefined] optional double screenY,
-                                             [Default=Undefined] optional double webkitRadiusX,
-                                             [Default=Undefined] optional double webkitRadiusY,
-                                             [Default=Undefined] optional float webkitRotationAngle,
-                                             [Default=Undefined] optional float webkitForce);
+                                             [Default=Undefined] optional double radiusX,
+                                             [Default=Undefined] optional double radiusY,
+                                             [Default=Undefined] optional float rotationAngle,
+                                             [Default=Undefined] optional float force);
     [RuntimeEnabled=Touch] TouchList createTouchList(Touch... touches);
 
     [CallWith=ScriptState, CustomElementCallbacks, RaisesException, MeasureAs=DocumentRegisterElement] CustomElementConstructor registerElement(DOMString name, optional Dictionary options);