The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/aebf7cafa3d964a4ffa2225d82c736ca38afcd64

commit aebf7cafa3d964a4ffa2225d82c736ca38afcd64
Author: Gabrielle Palado <gabpalado@google.com>
Date: Wed Jan 16 07:07:06 2019

Create experimental handwriting gesture flag for virtual keyboard.

Disabled by default as the UI is a WIP, and feasibility is being
evaluated.

Bug: 920519
Change-Id: Idc7e0a6e92aa0234de54b72f8e024e987da9f5dd
Reviewed-on: https://chromium-review.googlesource.com/c/1404759
Reviewed-by: Avi Drissman <avi@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Gabrielle Palado <gabpalado@google.com>
Cr-Commit-Position: refs/heads/master@{#623143}
[modify] https://crrev.com/aebf7cafa3d964a4ffa2225d82c736ca38afcd64/chrome/browser/about_flags.cc
[modify] https://crrev.com/aebf7cafa3d964a4ffa2225d82c736ca38afcd64/chrome/browser/extensions/api/virtual_keyboard_private/chrome_virtual_keyboard_delegate.cc
[modify] https://crrev.com/aebf7cafa3d964a4ffa2225d82c736ca38afcd64/chrome/browser/flag-metadata.json
[modify] https://crrev.com/aebf7cafa3d964a4ffa2225d82c736ca38afcd64/chrome/browser/flag_descriptions.cc
[modify] https://crrev.com/aebf7cafa3d964a4ffa2225d82c736ca38afcd64/chrome/browser/flag_descriptions.h
[modify] https://crrev.com/aebf7cafa3d964a4ffa2225d82c736ca38afcd64/tools/metrics/histograms/enums.xml
[modify] https://crrev.com/aebf7cafa3d964a4ffa2225d82c736ca38afcd64/ui/base/ui_base_features.cc
[modify] https://crrev.com/aebf7cafa3d964a4ffa2225d82c736ca38afcd64/ui/base/ui_base_features.h