GitLab

scroll_x() of gesture event is not reliable after checked on physical
device. Get the x drag amount from touch events as y drag amount.

Fling event is supported, which means the |drag_progress_| might
hasn't reached full progress while COMPLETING the drag.

Bug: 1002733
Change-Id: I66dfb4110e2e8f34445d67a5e5cc25681b3f8708
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1879821
Commit-Queue: Min Chen <minch@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#709295}