Combining multiple browsers windows into one is broken with the "Close window when closing last tab" option

[intrnl]

Description

Trying to combine multiple browser windows into one is broken if the "Close window when closing last tab" option is enabled.

Steps to Reproduce

1. Open two browser window, the two tabs can be anything.
2. Try to combine the two by drag and dropping one tab to another window's tab bar.

Actual result:

screenrecord-2022-10-28_11.29.08.mp4

Notice how the taskbar suddenly has new browser windows that are just the new tab page.

Expected result:

Expected result should be the same as without the "Close window when closing last tab" option enabled.

Reproduces how often:

Easily reproduced

Brave version (brave://version info)

Brave	1.47.25 Chromium: 107.0.5304.68 (Official Build) nightly (64-bit)
Revision	a4e93e89d3b3df1be22214603fba846ad0183ca5-refs/branch-heads/5304@{#991}
OS	Linux

Version/Channel Information:

• Can you reproduce this issue with the current release? Not tested
• Can you reproduce this issue with the beta channel? Not tested
• Can you reproduce this issue with the nightly channel? Yes, Nightly 1.47.25

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? No
• Does the issue resolve itself when disabling Brave Rewards? No
• Is the issue reproducible on the latest version of Chrome? No, this is a Brave-specific option

Miscellaneous Information:

None.