The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/bf0a104cbe8983fe35f235fa0b7dcc5ef8051519

commit bf0a104cbe8983fe35f235fa0b7dcc5ef8051519
Author: Zach Helfinstein <zhelfins@chromium.org>
Date: Fri Aug 10 15:18:53 2018

Refactor SwitchAccess to use same TreeWalker as CVox

Bug:  873016 
Change-Id: If8ee78b9e739aaad0403964948534c3305b26580
Reviewed-on: https://chromium-review.googlesource.com/1170383
Reviewed-by: David Tseng <dtseng@chromium.org>
Commit-Queue: Zach Helfinstein <zhelfins@chromium.org>
Cr-Commit-Position: refs/heads/master@{#582169}
[modify] https://crrev.com/bf0a104cbe8983fe35f235fa0b7dcc5ef8051519/chrome/browser/resources/chromeos/chromevox/BUILD.gn
[modify] https://crrev.com/bf0a104cbe8983fe35f235fa0b7dcc5ef8051519/chrome/browser/resources/chromeos/switch_access/BUILD.gn
[modify] https://crrev.com/bf0a104cbe8983fe35f235fa0b7dcc5ef8051519/chrome/browser/resources/chromeos/switch_access/automation_manager.js
[delete] https://crrev.com/f3b7eb373646c7ee8fa6136391ec97f5388bd474/chrome/browser/resources/chromeos/switch_access/automation_predicate.js
[delete] https://crrev.com/f3b7eb373646c7ee8fa6136391ec97f5388bd474/chrome/browser/resources/chromeos/switch_access/automation_predicate_unittest.gtestjs
[modify] https://crrev.com/bf0a104cbe8983fe35f235fa0b7dcc5ef8051519/chrome/browser/resources/chromeos/switch_access/commands.js
[modify] https://crrev.com/bf0a104cbe8983fe35f235fa0b7dcc5ef8051519/chrome/browser/resources/chromeos/switch_access/manifest.json.jinja2
[modify] https://crrev.com/bf0a104cbe8983fe35f235fa0b7dcc5ef8051519/chrome/browser/resources/chromeos/switch_access/switch_access.js
[modify] https://crrev.com/bf0a104cbe8983fe35f235fa0b7dcc5ef8051519/chrome/browser/resources/chromeos/switch_access/switch_access_interface.js
[add] https://crrev.com/bf0a104cbe8983fe35f235fa0b7dcc5ef8051519/chrome/browser/resources/chromeos/switch_access/switch_access_predicate.js
[add] https://crrev.com/bf0a104cbe8983fe35f235fa0b7dcc5ef8051519/chrome/browser/resources/chromeos/switch_access/switch_access_predicate_unittest.gtestjs
[delete] https://crrev.com/f3b7eb373646c7ee8fa6136391ec97f5388bd474/chrome/browser/resources/chromeos/switch_access/tree_walker.js
[delete] https://crrev.com/f3b7eb373646c7ee8fa6136391ec97f5388bd474/chrome/browser/resources/chromeos/switch_access/tree_walker_unittest.gtestjs

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/de5361ff5e907b4ff4716f7644ce2a1d09713e91

commit de5361ff5e907b4ff4716f7644ce2a1d09713e91
Author: Zach Helfinstein <zhelfins@chromium.org>
Date: Wed Aug 15 02:05:59 2018

Expose default action of non-leaf nodes in SwitchAccess

Bug:  873016 
Change-Id: Ia69e01e4839d4ae215d8cc97d588cc33abbd17b4
Reviewed-on: https://chromium-review.googlesource.com/1170907
Commit-Queue: Zach Helfinstein <zhelfins@chromium.org>
Reviewed-by: David Tseng <dtseng@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583127}
[modify] https://crrev.com/de5361ff5e907b4ff4716f7644ce2a1d09713e91/chrome/browser/resources/chromeos/switch_access/auto_scan_manager.js
[modify] https://crrev.com/de5361ff5e907b4ff4716f7644ce2a1d09713e91/chrome/browser/resources/chromeos/switch_access/auto_scan_manager_unittest.gtestjs
[modify] https://crrev.com/de5361ff5e907b4ff4716f7644ce2a1d09713e91/chrome/browser/resources/chromeos/switch_access/automation_manager.js
[modify] https://crrev.com/de5361ff5e907b4ff4716f7644ce2a1d09713e91/chrome/browser/resources/chromeos/switch_access/commands.js
[modify] https://crrev.com/de5361ff5e907b4ff4716f7644ce2a1d09713e91/chrome/browser/resources/chromeos/switch_access/switch_access.js
[modify] https://crrev.com/de5361ff5e907b4ff4716f7644ce2a1d09713e91/chrome/browser/resources/chromeos/switch_access/switch_access_interface.js