In line 100 of the test (https://cs.chromium.org/chromium/src/third_party/WebKit/LayoutTests/fast/events/pointerevents/pointerevent_touch-action-pinch_zoom_touch.html?q=pointerevent_touch-action-pinch_zoom_touch.html&dr&l=100) the assertion comment expects the scroll listener not to get called, but the assertion itself checks that it's been executed. Based on the two next assertions seems like the comment is the correct expected behavior.

When running with --enable-features=TouchpadAndWheelScrollLatching, the assertion in line 100 fails since the test has behaved as intended in the assertion's comment.