Pointer Events - lostpointercapture when capturing element in shadow dom is removed

Test Description: This test checks if lostpointercapture is fired at the document when the capturing node that is in shadow dom is removed from the shadow dom. Complete the following actions:
Press left mouse button over "Set Capture" button. Pointer should be captured by the gray rectangle which is in shadow dom.
Gray rectangle will be removed from shadow dom.
"lostpointercapture" should be received on the document not on the gray rectangle.


Pointer will be captured by the shadow dom gray rectangle.
Gray rectangle received pointercapture.
Removing gray rectangle from shadow dom.
Test Passed! Document received lostpointercapture.

PASS lostpointercapture is dispatched on the document when shadow dom capturing element is removed