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 9537778eb9034872cbca02318fd3cce16b675b0a..f4a88c132fd4aac1746d90484c9e9ac27d79a1e0 100644
--- a/Source/core/dom/Document.idl
+++ b/Source/core/dom/Document.idl
@@ -191,7 +191,9 @@ interface Document : Node {
                                              [Default=Undefined] optional double webkitRadiusX,
                                              [Default=Undefined] optional double webkitRadiusY,
                                              [Default=Undefined] optional float webkitRotationAngle,
-                                             [Default=Undefined] optional float webkitForce);
+                                             [Default=Undefined] optional float webkitForce,
+                                             [Default=Undefined] optional float webkitTilt,

[Rick Byers, 2015/02/13 08:48:05]

remove webkit prefix - that's legacy.  In fact only 'webkitRotationAngle' is
still only available by a prefix (so webkitForce/radius* could also have the
prefix removed if you like).

[d.pikalov, 2015/02/13 13:31:17]

Also, we have to remove those webkit-prefixed properties in Touch.idl, right ?

+                                             [Default=Undefined] optional float webkitTiltDirection);
     [RuntimeEnabled=Touch] TouchList createTouchList(Touch... touches);
 
     [CallWith=ScriptState, CustomElementCallbacks, RaisesException, MeasureAs=DocumentRegisterElement] CustomElementConstructor registerElement(DOMString name, optional ElementRegistrationOptions options);