UserAgent: Mozilla/5.0 (X11; CrOS x86_64 9000.82.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36
Platform: 9000.82.0 (Official Build) stable-channel stumpy

Steps to reproduce the problem:
SUMMARY
=======

If we are logged in as two different users, and the not-visible user has an open Chrome window, but the visible user has no open Chrome window, then hitting ctrl-T or ctrl-shift-N as the visible user opens a window or tab for the not-visible user.

DESCRIPTION
===========

Our machine is a Chromebox with a single screen.

Suppose we are logged in as machine owner A (aka profile A). And we are also logged in as a second user B (aka profile B).

We begin the experiment with all windows and apps closed in both profiles, so only the background is seen in both.

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Experiment 1, with ctrl-T.

With profile A visible on the screen, we hit ctrl-T. As expected, a Chrome browser window appears.

We switch to profile B with ctrl-alt->. No windows are open in profile B. Now we hit ctrl-T. We expect to see a Chrome browser window, but nothing happens.

We switch back to profile A with ctrl-alt->. And we see that profile A now has two open tabs. So the ctrl-T that was hit when profile B was visible actually affected profile A instead.

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Experiment 2, with ctrl-shift-N.

We repeat the entire experiment from the beginning. This time we hit ctrl-shift-N instead of ctrl-T.

The same surprising behavior occurs, except that in profile A we now we see two tabs in an incognito window, instead of two tabs in a normal window.

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Experiment 3, with both ctrl-T and ctrl-shift-N.

We repeat the experiment as before with all windows closed.

In profile A we hit ctrl-T. As expected, a Chrome window appears.

We switch to profile B with ctrl-alt->. Now we hit ctrl-shift-N. We expect an incognito window but nothing happens.

We switch to profile A with ctrl-alt->. And we notice that profile A now has an normal window open and also an incognito window open.

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If a window is already open in the current profile, then ctrl-T and ctrl-shift-N behave as expected.

If no window is open in either profile, then ctrl-T and ctrl-shift-N again behave as expected.

The misbehavior occurs only if the visible profile has no window open and the other not-visible profile has a window open.

What is the expected behavior?
See above

What went wrong?
See above

Did this work before? Yes The version in effect before the latest "restart to update" on my Chromebox.

Chrome version: 56.0.2924.87  Channel: stable
OS Version: 9000.82.0
Flash Version: Shockwave Flash 24.0 r0