Unable to build with no ozone, but X11 only?

[TCH68k]

OS/Platform

Debian, Ubuntu, and derivatives

Installed

Compiled from source

Version

115.0.5790.99

Have you tested that this is not an upstream issue or an issue with your configuration?

• [ ] I have tried reproducing this issue in Chrome and it could not be reproduced there
• [ ] I have tried reproducing this issue in vanilla Chromium and it could not be reproduced there
• [ ] I have tried reproducing this issue in ungoogled-chromium with a new and empty profile using --user-data-dir command line argument and it could not be reproduced there

Description

Setting use_ozone to false causes build failure.

How to Reproduce?

1. Put use_ozone=false into flags.gn.
2. Build.

Actual behaviour

Error message:

ERROR at //ui/platform_window/common/BUILD.gn:8:1: Assertion failed.
assert(use_ozone)
^-----
See //ui/aura/BUILD.gn:260:15: which caused the file to be included.
    deps += [ "//ui/platform_window/common" ]
              ^----------------------------

Expected behaviour

Build without ozone, using X11 only, without a middle layer.

Relevant log output

ERROR at //ui/platform_window/common/BUILD.gn:8:1: Assertion failed.
assert(use_ozone)
^-----
See //ui/aura/BUILD.gn:260:15: which caused the file to be included.
    deps += [ "//ui/platform_window/common" ]
              ^----------------------------
ninja: Entering directory `out/Release'
ninja: error: loading 'build.ninja': No such file or directory

Additional context

No response

[PF4Public]

Build without ozone, using X11 only, without a middle layer.

Not possible.