Unable to reproduce the issue on Win-10 surface pro using chrome reported version #67.0.3396.79 and latest canary #69.0.3455.0.

Attached a screen cast for reference.

Following are the steps followed to reproduce the issue.
------------
1. Opened the attached file "pointerevent.html "
2. Placed stylus on page holding the eraser button.
2. Lifted stylus.
3. Multiple pointer events were fired: pointerdown, gotpointercapture, pointerup, lostpointercapture as expected.

steven.oeyen@ - Could you please check the attached screen cast and please let us know if anything missed from our end. Also please check the issue on latest canary #69.0.3455.0 by creating a new profile without any apps and extensions and please let us know if the issue still persist or not.

Thanks...!!

Deleted: 851457.mp4 1.3 MB

	851457.mp4 1.3 MB View Download

Hi, in the screen cast it seems the "right mouse" button is being pressed.
The eraser button on the MS Surface Pro Stylus is the back of the Stylus, not the button on the side.
Placing the back of the stylus on the screen does not trigger all pointer events. I've also tested with a generic pen on another touch display, behavior is the same.
I will get back to you on canary #69.0.3455.0

Thank you for providing more feedback. Adding the requester to the cc list.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

I can confirm the issue persists on canary #69.0.3455.0

The issue looks similar to issue id: 850011. Hence, merging into issue id: 850011.

Thanks...!!

Could you tell us what stylus you use? Is it the same for external stylus or only surface stylus?
Can you provide the results and the list of actions you do in text please? Like the actual output and expected output after each action. That would be great if you can also provide the button and buttons value of those events you are printing.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a7b13da0ce3c2a57eae58499b1e8c13e8432baa7

commit a7b13da0ce3c2a57eae58499b1e8c13e8432baa7
Author: lanwei <lanwei@chromium.org>
Date: Mon Jul 16 19:33:10 2018

Make sure that the corresponding pointer events are sent when pressing
eraser button

When we press an eraser button of a stylus, we should send the missing
pointerdown, pointerup, gotpointercapture and lostpointercapture events.

Bug:  851457 
Change-Id: Iff45a897a87ef03d73cc308d84e874dbc1310fa1
Reviewed-on: https://chromium-review.googlesource.com/1129619
Commit-Queue: Lan Wei <lanwei@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Reviewed-by: Dave Tapuska <dtapuska@chromium.org>
Reviewed-by: Navid Zolghadr <nzolghadr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575384}
[modify] https://crrev.com/a7b13da0ce3c2a57eae58499b1e8c13e8432baa7/third_party/blink/renderer/core/events/pointer_event_factory.cc
[modify] https://crrev.com/a7b13da0ce3c2a57eae58499b1e8c13e8432baa7/third_party/blink/renderer/core/events/pointer_event_factory_test.cc
[modify] https://crrev.com/a7b13da0ce3c2a57eae58499b1e8c13e8432baa7/ui/views/win/pen_event_processor.cc
[modify] https://crrev.com/a7b13da0ce3c2a57eae58499b1e8c13e8432baa7/ui/views/win/pen_event_processor.h
[modify] https://crrev.com/a7b13da0ce3c2a57eae58499b1e8c13e8432baa7/ui/views/win/pen_event_processor_unittest.cc