[Desktop] In Private Window with Tor custom theme is not applied

[btlechowski]

Follow up to #9808 - Brave Custom Theme Install results in visibility issues
In Private Window with Tor Custom Theme is not applied on Linux.

Steps to Reproduce

1. Clean install
2. Open Private Window with Tor
3. Close Private Window with Tor
4. Install https://chrome.google.com/webstore/detail/pro-grey/enhpebdanojkmhbbneclbkmpleemilaj
5. Open Private Window with Tor

IMPORTANT: This issue is fixed after browser restart

Actual result:

Custom theme is not applied

Expected result:

Custom theme should be applied

Reproduces how often:

100% repro rate

Brave version (brave://version info)

Brave	1.10.87 Chromium: 83.0.4103.61 (Official Build) (64-bit)
Revision	94f915a8d7c408b09cc7352161ad592299f384d2-refs/branch-heads/4103@{#561}
OS	Ubuntu 18.04 LTS

cc @brave/legacy_qa @rebron @simonhong @mkarolin

[btlechowski]

Just reproduced the issue on Windows

Brave	1.11.58 Chromium: 83.0.4103.61 (Official Build) beta (64-bit)
Revision	94f915a8d7c408b09cc7352161ad592299f384d2-refs/branch-heads/4103@{#561}
OS	Windows 7 Service Pack 1 (Build 7601.24544)

[mkarolin]

cc: @simonhong would you mind taking a look if you have a chance?

[simonhong]

@mkarolin Yup, assigned to me :)

[rebron]

Closing. This is a wontfix. Custom themes should just apply to normal windows. If applied to private window with Tor, users won't be able to differentiate among the windows.

[btlechowski]

@rebron Custom theme on Private Window and Private Window with Tor has already been implemented in #9808. If this is not a desired behavior then we should turn off themes for those windows types.

This issue is just a special case when the theme is not immediately applied after installing the custom theme on Private Window with Tor

[simonhong]

@btlechowski is right. Currently, custom theme is applied on all windows(including private, tor private).
If we don't want to use custom theme for Tor window, please file an issue.