Safari and Firefox both update the cursor once momentum scrolling *ends*, interestingly enough.

This is happening as far back as M45 so it is not a recent regression. IMHO, the problem is not that the cursor does not update during scroll but that it does not update even after scroll ends.

On other platform Chrome also updates the mouse cursor once the scrolling ends. So this seems to be a Mac UI Bug rather than a Blink Scrolling bug. I updated labels to reflect this. 

[mac triage] Should be fixable

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ecfc59c0dcd79727c03fd8e835036cd7a8ad8e99

commit ecfc59c0dcd79727c03fd8e835036cd7a8ad8e99
Author: jongkwon.lee <jongkwon.lee@navercorp.com>
Date: Thu Jul 27 05:45:45 2017

Make the cursor update instantly without mouse move events

NSWindow's invalidateCursorRectsForView: resets cursor rects but do not
update the cursor instantly. The cursor is updated when the mouse moves.
Make the the cursor updated by setting the current cursor if not hidden.

Bug:  664502 
Change-Id: I2ecceea588330ede44aff3fe93a953845bc395ff
Reviewed-on: https://chromium-review.googlesource.com/585032
Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: Trent Apted <tapted@chromium.org>
Commit-Queue: Simon Hong <simonhong@chromium.org>
Cr-Commit-Position: refs/heads/master@{#489866}
[modify] https://crrev.com/ecfc59c0dcd79727c03fd8e835036cd7a8ad8e99/content/browser/renderer_host/render_widget_host_view_mac.h
[modify] https://crrev.com/ecfc59c0dcd79727c03fd8e835036cd7a8ad8e99/content/browser/renderer_host/render_widget_host_view_mac.mm

Rechecked this issue on Chrome canary version 62.0.3169.0 on MAC 10.12.6. Fix is working as intended. The cursor changes back to the default when the link is no longer under the cursor. Adding  TE-Verified labels.

Thanks.!

Thanks for the fix!