Fix for a GSB getting sent without a GSE.

This CL fixes an issue where a GSB was getting sent without closing an
existing scroll. There were some workarounds in place since a known bug
(crbug.com/979408) prevented us from using mouseUpAt. Since that bug is
fixed, the API mouseUpAt can now be used to send a GSE.

Bug: 979408
Change-Id: I571c714b5612f2190828ad0d0b60f790a832bcbb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2045213
Reviewed-by: David Bokan <[email protected]>
Commit-Queue: Rahul Arakeri <[email protected]>
Cr-Commit-Position: refs/heads/master@{#741115}
4 files changed