Handle "frame-less" creation of Touch objects.

LayoutTests/fast/events/touch/document-create-touch-expected.txt

Index: LayoutTests/fast/events/touch/document-create-touch-expected.txt
diff --git a/LayoutTests/fast/events/touch/document-create-touch-expected.txt b/LayoutTests/fast/events/touch/document-create-touch-expected.txt
index d890022b8fc723e9a6f4cdef71edd290b5a07c02..f276d66a7adc6069cda88957c4680cadf0699bdd 100644
--- a/LayoutTests/fast/events/touch/document-create-touch-expected.txt
+++ b/LayoutTests/fast/events/touch/document-create-touch-expected.txt
@@ -46,6 +46,20 @@ PASS badParamsTouch.webkitRadiusX is 0
 PASS badParamsTouch.webkitRadiusY is 0
 FAIL badParamsTouch.webkitRotationAngle should be NaN. Was 0.
 FAIL badParamsTouch.webkitForce should be NaN. Was 0.
+PASS detachedTouch = document.implementation.createDocument('a', 'b').createTouch() is non-null.
+PASS detachedTouch.target is null
+PASS detachedTouch.identifier is 0
+PASS detachedTouch.pageX is 0
+PASS detachedTouch.pageY is 0
+PASS detachedTouch.screenX is 0
+PASS detachedTouch.screenY is 0
+PASS detachedTouch.radiusX is 0
+PASS detachedTouch.radiusY is 0
+FAIL detachedTouch.force should be NaN. Was 0.
+PASS detachedTouch.webkitRadiusX is 0
+PASS detachedTouch.webkitRadiusY is 0
+FAIL detachedTouch.webkitRotationAngle should be NaN. Was 0.
+FAIL detachedTouch.webkitForce should be NaN. Was 0.
 PASS successfullyParsed is true
 
 TEST COMPLETE