Sync the Touch-related interfaces with the two specs

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
+
 [
     WillBeGarbageCollected,
 ] interface Touch {
-    readonly attribute double           clientX;
-    readonly attribute double           clientY;
-    readonly attribute double           screenX;
-    readonly attribute double           screenY;
-    readonly attribute double           pageX;
-    readonly attribute double           pageY;
-    readonly attribute EventTarget      target;
-    readonly attribute unsigned long    identifier;
-    readonly attribute double           radiusX;
-    readonly attribute double           radiusY;
-    readonly attribute float            force;
+    // FIXME: identifier should be long, not unsigned long.
+    readonly attribute unsigned 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
+    // FIXME: radiusX and radiusY should be float, not double.
+    readonly attribute double radiusX;
+    readonly attribute double radiusY;
+    readonly attribute float force;
+
+    // Non-standard APIs
     [MeasureAs=PrefixedTouchRadiusX] readonly attribute double webkitRadiusX;
     [MeasureAs=PrefixedTouchRadiusY] readonly attribute double webkitRadiusY;
     [MeasureAs=PrefixedTouchRotationAngle] readonly attribute float webkitRotationAngle;
     [MeasureAs=PrefixedTouchForce] readonly attribute float webkitForce;
 };