commit 7b7f672086ec9fb1f8c67225e49bfe75c7977a2e
author Matt Amert <Matthew.Amert@microsoft.com> Thu Oct 03 00:27:42 2019
committer Commit Bot <commit-bot@chromium.org> Thu Oct 03 00:27:42 2019
tree 9eb273d1d83da6627d88ef1de0ad4f1499e38d2d
parent ef75841af7f5779f83dd98eae1d9044e3104478f

Refactored WebMouseWheelEvent to use ScrollGranularity.

WebMouseWheelEvent currently uses two bools to represent the units of
the delta; one for precise pixel units and one for page units. However,
it is undefined for them to both be true, and adding new units would not
be trivial; as such, it should instead be represented as an enum.
ScrollGranularity already includes this information, and so is used as
the enum. However, since some of the other units (e.g. line) were
previously not supported, a DCHECK has been added to the mouse wheel
event queue to check that we aren't getting units we weren't expecting.

This refactoring work is done on behalf of the CL
http://crrev.com/c/1776898, which will be adding percentage units to
ScrollGranularity.

Bug: 1008132
Change-Id: I3972a375edfceefd29bbb05254c810d60706e3ef
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1812330
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Bill Budge <bbudge@chromium.org>
Reviewed-by: Ken Buchanan <kenrb@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: Daniel Libby <dlibby@microsoft.com>
Reviewed-by: David Bokan <bokan@chromium.org>
Commit-Queue: Matt Amert <Matthew.Amert@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#702259}