commit 33bd48543efb26beb7244c60cfde3dfd6306fe92
author Kevin McNee <mcnee@chromium.org> Thu Jul 19 14:36:46 2018
committer Commit Bot <commit-bot@chromium.org> Thu Jul 19 14:36:46 2018
tree 4692a020f4f0d328fc53251c4c1199595696d479
parent 2b96359c3260886f02f88a1cada43a0b79b9a186

Only generate a synthetic fling cancel at the start of a touchpad scroll

As part of issue 855840, we will need to hit test touchpad gesture fling
cancel events. However, we currently generate a synthetic fling cancel
before every wheel event in a scroll. This is excessive, since we have
wheel scroll latching, and would become expensive, since we would need
to hit test them all.

We now only generate a synthetic fling cancel at the beginning of a
touchpad scroll.

Bug: 855840
Change-Id: I108393814065c90cea80ba5326772a1764526ad7
Reviewed-on: https://chromium-review.googlesource.com/1138637
Commit-Queue: Kevin McNee <mcnee@chromium.org>
Reviewed-by: Timothy Dresser <tdresser@chromium.org>
Reviewed-by: Sahel Sharify <sahel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#576486}