Sync TouchEvent interfaces with the latest editors draft spec

Source/core/dom/Touch.idl

 /*
  * Copyright 2008, The Android Open Source Project
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-// http://rawgit.com/w3c/touch-events/v1-errata/touchevents.html#touch-interface
+// https://w3c.github.io/touch-events/#touch-interface
+
+// TODO(rbyers): Touch should have a constructor. http://crbug.com/508675
 
 [
     WillBeGarbageCollected,
 ] interface Touch {
     readonly attribute long identifier;
     readonly attribute EventTarget target;
     readonly attribute double screenX;
     readonly attribute double screenY;
     readonly attribute double clientX;
     readonly attribute double clientY;
     readonly attribute double pageX;
     readonly attribute double pageY;
-
-    // Touch Events Extensions
-    // http://rawgit.com/w3c/touch-events/master/touchevents.html#touch-interface
     readonly attribute float radiusX;
     readonly attribute float radiusY;
     readonly attribute float rotationAngle;
     readonly attribute float force;
 
     // Non-standard APIs
     [DeprecateAs=PrefixedTouchRadiusX, ImplementedAs=radiusX] readonly attribute float webkitRadiusX;
     [DeprecateAs=PrefixedTouchRadiusY, ImplementedAs=radiusY] readonly attribute float webkitRadiusY;
     [DeprecateAs=PrefixedTouchRotationAngle, ImplementedAs=rotationAngle] readonly attribute float webkitRotationAngle;
     [DeprecateAs=PrefixedTouchForce, ImplementedAs=force] readonly attribute float webkitForce;
 };