One issue I'm seeing here is that when I click on the microphone icon on google.com, Next reads out the full content of the dialog that pops up to have the user enable okay google. But, I can't use chromevox navigation to get to those buttons to either enable or press no thanks.

Once I use the mouse to click on this icon, the feature works. The issue is actually the accessibility of that dialog with Next, though. 

Adding as P1 since this an issue with accessing UI on google.com 

THis dialog appears elsewhere (e.g. photo, microphone, notification, and location permissions). They're all inaccessible with NExt

This mostly works in 53 except for a hang which I have a fix for.

I use to be able to use OK Google  a while ago on CLassic on my previous CHromeBOok

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/4d356e830cd6c653cf7979e16754faeef1e6f953

commit 4d356e830cd6c653cf7979e16754faeef1e6f953
Author: dtseng <dtseng@chromium.org>
Date: Wed Jun 15 23:42:03 2016

Fix alert dialog output.

An alert dialog uses $descendants for its enter rule, but this potentially results in infinite recursion since a descendant's format rule may walk up to the alert dialog to format an ancestor. We should never use children in the formatting of enter rules.

A specific case where this hits is in the
google.com -> search by voice

permissions dialog. Moving forward from the close button results in the above mentioned infinite recursion.

BUG= 619417 , 619388 
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:closure_compilation

Review-Url: https://codereview.chromium.org/2075473002
Cr-Commit-Position: refs/heads/master@{#400044}

[modify] https://crrev.com/4d356e830cd6c653cf7979e16754faeef1e6f953/chrome/browser/resources/chromeos/chromevox/cvox2/background/output.js

verified on 53.0.2768.0

"OK, GOogle" doesn't respond for me.
In addition, "retrain voice model" link in chrome://settings is non-functional with ENTER, SPACEBAR, or SEARCH+SPACEBAR.

OK GOogle still doesn't work for me on:
54.0.2787.0
I re-enrolled OK GOogle, but don't hear chime after saying OK Google post-enrollment

I went to TEchStop to debug this further:
1. Dell ChromeBook (stable build) with ChromeVOx Classic does *not* have voice training, nor does OK GOogel trigger.
2. Samus (Canary) with cvox2 has VOice Training (works fine), but hotwording does not trigger (nor does microphone show in a fresh tab). We also tried without cvox, which had the same result. 

We went through various debugging/troubleshooting docs for "OK Google" on Chrome OS, but couldn't get it to work on 2 different ChromeBooks.