PointerEvent.constructor should not modify the target of the events w…

…hich are passed as coalesced or predicted events

If an event doesn't have a target, offsetX/Y behave differently. Those shouldn't be modified.

Differential Revision: https://phabricator.services.mozilla.com/D136379

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1750994
gecko-commit: d6b67b402ddeb3c4b5288ce065622ea626d2e6bf
gecko-reviewers: edgar

pointerevents/pointerevent_constructor.html

@@ -38,13 +38,13 @@ <h4>Test Description: This test checks if PointerEvent constructor works properl
                         ["getCoalescedEvents()[" + i + "].isPrimary", coalescedEvent.isPrimary, event.isPrimary],
                         ["getCoalescedEvents()[" + i + "].getCoalescedEvents().length", coalescedEvent.getCoalescedEvents().length, 0],
                         ["getCoalescedEvents()[" + i + "].getPredictedEvents().length", coalescedEvent.getPredictedEvents().length, 0],
-                        ["getCoalescedEvents()[" + i + "].target", coalescedEvent.target, target0],
+                        ["getCoalescedEvents()[" + i + "].target", coalescedEvent.target, null],
                         ["getCoalescedEvents()[" + i + "].currentTarget", coalescedEvent.currentTarget, null],
                         ["getCoalescedEvents()[" + i + "].eventPhase", coalescedEvent.eventPhase, Event.NONE],
                         ["getCoalescedEvents()[" + i + "].cancelable", coalescedEvent.cancelable, false],
                         ["getCoalescedEvents()[" + i + "].bubbles", coalescedEvent.bubbles, false],
-                        ["getCoalescedEvents()[" + i + "].offsetX", coalescedEvent.offsetX, event.offsetX + (i==0?-10:0)],
-                        ["getCoalescedEvents()[" + i + "].offsetY", coalescedEvent.offsetY, event.offsetY],
+                        ["getCoalescedEvents()[" + i + "].offsetX", coalescedEvent.offsetX, 310 + (i==0?-10:0)],
+                        ["getCoalescedEvents()[" + i + "].offsetY", coalescedEvent.offsetY, 0],
                     ]);
                 }
                 for (var i=0; i<event.getPredictedEvents().length; i++) {
@@ -55,13 +55,13 @@ <h4>Test Description: This test checks if PointerEvent constructor works properl
                         ["getPredictedEvents()[" + i + "].isPrimary", predictedEvent.isPrimary, event.isPrimary],
                         ["getPredictedEvents()[" + i + "].getCoalescedEvents().length", predictedEvent.getCoalescedEvents().length, 0],
                         ["getPredictedEvents()[" + i + "].getPredictedEvents().length", predictedEvent.getPredictedEvents().length, 0],
-                        ["getPredictedEvents()[" + i + "].target", predictedEvent.target, target0],
+                        ["getPredictedEvents()[" + i + "].target", predictedEvent.target, null],
                         ["getPredictedEvents()[" + i + "].currentTarget", predictedEvent.currentTarget, null],
                         ["getPredictedEvents()[" + i + "].eventPhase", predictedEvent.eventPhase, Event.NONE],
                         ["getPredictedEvents()[" + i + "].cancelable", predictedEvent.cancelable, false],
                         ["getPredictedEvents()[" + i + "].bubbles", predictedEvent.bubbles, false],
-                        ["getPredictedEvents()[" + i + "].offsetX", predictedEvent.offsetX, event.offsetX + (i==0?10:20)],
-                        ["getPredictedEvents()[" + i + "].offsetY", predictedEvent.offsetY, event.offsetY],
+                        ["getPredictedEvents()[" + i + "].offsetX", predictedEvent.offsetX, 310 + (i==0?10:20)],
+                        ["getPredictedEvents()[" + i + "].offsetY", predictedEvent.offsetY, 0],
                     ]);
                 }
             }));