Added experimental tilt and tiltDirection to the Touch interface

Source/core/dom/Document.idl

Index: Source/core/dom/Document.idl
diff --git a/Source/core/dom/Document.idl b/Source/core/dom/Document.idl
index 40a0d9789ddbcdb0b93760af74c6fc243a6f2798..09d3b8c6854af6f8f8f5f6bdd40f756123e701e3 100644
--- a/Source/core/dom/Document.idl
+++ b/Source/core/dom/Document.idl
@@ -178,7 +178,9 @@ interface Document : Node {
                                              [Default=Undefined] optional unrestricted double webkitRadiusX,
                                              [Default=Undefined] optional unrestricted double webkitRadiusY,
                                              [Default=Undefined] optional unrestricted float webkitRotationAngle,
-                                             [Default=Undefined] optional unrestricted float webkitForce);
+                                             [Default=Undefined] optional unrestricted float webkitForce,
+                                             [Default=Undefined] optional unrestricted float tilt,
+                                             [Default=Undefined] optional unrestricted float tiltDirection);
     [RuntimeEnabled=Touch] TouchList createTouchList(Touch... touches);
 
     // FIXME: The spec doesn't define these event handler attributes.