Unable to reproduce the issue on Ubuntu 14.04 using chrome latest stable M55-55.0.2883.87 by following steps mentioned below.

1. Created multiple user on different profile
2. Installed dark theme 
https://chrome.google.com/webstore/detail/material-dark-mkbhd/iiplegjeipnjdpgkeccfccnahofbckad
3. Clicked on profile switch menu
4. Observed the profile names are displayed in light background and dark text as expected.

Repoerter@ Could you please confirm is the above steps is the right way to reproduce this issue? If not please let us know on which theme you are actually facing this issue.

Thanks!

That theme indeed works, maybe because of 2 things:
- It is a Chrome theme (in my example the dark theme is GTK itself)
- On that theme, the user switching menu has a light background

In fact, I've tried to install several dark themes from Chrome Web Store and they all show the user switching menu with light background.

Try installing Arc theme from http://www.noobslab.com/2016/06/arc-theme-light-dark-versions-and-icons.html and pick the Arc Dark theme. Also, make sure that Chrome is set to use the GTK theme.

Thank you for providing more feedback. Adding requester "brajkumar@chromium.org" for another review and adding "Needs-Review" label for tracking.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

X-reffing images for https://codereview.chromium.org/2624683002/

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The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0

commit 8af777bf6b7bdd749632cfa5c2fde7a3f98038c0
Author: thomasanderson <thomasanderson@google.com>
Date: Tue Feb 07 01:12:49 2017

Add old_state parameter to CustomButton::StateChanged

This change is necessary for
https://codereview.chromium.org/2624683002/

BUG= 677286 
R=sky@chromium.org

Review-Url: https://codereview.chromium.org/2680643002
Cr-Commit-Position: refs/heads/master@{#448486}

[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ash/common/system/chromeos/audio/volume_view.cc
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ash/common/system/chromeos/network/network_state_list_detailed_view.cc
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ash/common/system/tray/tray_popup_header_button.cc
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ash/common/system/tray/tray_popup_header_button.h
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/chrome/browser/ui/views/payments/payment_request_row_view.cc
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/chrome/browser/ui/views/payments/payment_request_row_view.h
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/chrome/browser/ui/views/profiles/profile_chooser_view.cc
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ui/app_list/views/app_list_item_view.cc
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ui/app_list/views/app_list_item_view.h
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ui/app_list/views/tile_item_view.cc
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ui/app_list/views/tile_item_view.h
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ui/chromeos/ime/candidate_view.cc
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ui/chromeos/ime/candidate_view.h
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ui/message_center/views/notification_button.cc
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ui/message_center/views/notification_button.h
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ui/views/controls/button/custom_button.cc
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ui/views/controls/button/custom_button.h
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ui/views/controls/button/label_button.cc
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ui/views/controls/button/label_button.h
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ui/views/controls/button/md_text_button.cc
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ui/views/controls/button/md_text_button.h
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ui/views/controls/button/menu_button.cc
[modify] https://crrev.com/8af777bf6b7bdd749632cfa5c2fde7a3f98038c0/ui/views/controls/button/menu_button.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f0de79a0e44c878b66df8012e77ff38896fe8faf

commit f0de79a0e44c878b66df8012e77ff38896fe8faf
Author: thomasanderson <thomasanderson@google.com>
Date: Tue Feb 07 04:29:26 2017

Linux UI: Fix profile chooser button background color

Previously, the profile chooser hovered background color was hardcoded to
0xEAEAEA.  This is about the same color as dark themes will use for their label
text, making the hovered text unreadable.  This CL changes the color to use the
menu item hovered color instead.  Images of the change at:
https://bugs.chromium.org/p/chromium/issues/detail?id=677286#c7

BUG= 677286 
R=sky@chromium.org

Review-Url: https://codereview.chromium.org/2624683002
Cr-Commit-Position: refs/heads/master@{#448542}

[modify] https://crrev.com/f0de79a0e44c878b66df8012e77ff38896fe8faf/chrome/browser/ui/libgtkui/native_theme_gtk3.cc
[modify] https://crrev.com/f0de79a0e44c878b66df8012e77ff38896fe8faf/chrome/browser/ui/views/profiles/profile_chooser_view.cc
[modify] https://crrev.com/f0de79a0e44c878b66df8012e77ff38896fe8faf/chrome/browser/ui/views/profiles/profile_chooser_view.h
[modify] https://crrev.com/f0de79a0e44c878b66df8012e77ff38896fe8faf/ui/views/controls/label.h