I have a changelist to do this: https://chromium-review.googlesource.com/c/chromium/src/+/1401053

I can assign it to you if you'd like to take it through review, or I can move forward with it.

Thank you! Then let me assign this issue to you.

Would you refer this bug from the CL description of the CL?

Done!

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/66d32b7eafb28cd1660a61028c5b0dfa7ea7de48

commit 66d32b7eafb28cd1660a61028c5b0dfa7ea7de48
Author: Anastasia Helfinstein <anastasi@google.com>
Date: Thu Jan 10 18:38:05 2019

Remap dump tree CVox command so as not to conflict with Dictation

Bug:  920031 
Change-Id: If1dbb994376dfc17977dac665bd198623c4f8dae
Reviewed-on: https://chromium-review.googlesource.com/c/1401053
Reviewed-by: David Tseng <dtseng@chromium.org>
Commit-Queue: Anastasia Helfinstein <anastasi@google.com>
Cr-Commit-Position: refs/heads/master@{#621659}
[modify] https://crrev.com/66d32b7eafb28cd1660a61028c5b0dfa7ea7de48/chrome/browser/resources/chromeos/chromevox/chromevox/background/keymaps/next_keymap.json