I will disable the test.

From logs:
[ RUN      ] WebViewBrowserPluginInteractiveTest.EnsureFocusSynced
Xlib:  extension "RANDR" missing on display ":99".
Fontconfig warning: "/etc/fonts/fonts.conf", line 146: blank doesn't take any effect anymore. please remove it from your fonts.conf
[13637:13675:0129/131741.088188:ERROR:bus.cc(394)] Failed to connect to the bus: Could not parse server address: Unknown address type (examples of valid types are "tcp" and on UNIX "unix")
[13637:13637:0129/131741.108253:WARNING:password_store_factory.cc(241)] Using basic (unencrypted) store for password storage. See https://chromium.googlesource.com/chromium/src/+/master/docs/linux_password_storage.md for more information about password storage options.
(interactive_ui_tests:13637): LIBDBUSMENU-GLIB-WARNING **: Unable to get session bus: Unknown or unsupported transport 'disabled' for address 'disabled:'
LaunchProcess: failed to execvp:
xdg-desktop-menu
LaunchProcess: failed to execvp:
xdg-icon-resource
[13637:13654:0129/131741.590183:WARNING:shell_integration_linux.cc(324)] Could not install icon chrome-mmccpiphegbgldikojlcelogighcmhpl-Default.png at size 512.
LaunchProcess: failed to execvp:
xdg-desktop-menu
../../chrome/browser/apps/guest_view/web_view_interactive_browsertest.cc:1269: Failure
Expected equality of these values:
  guest_web_contents
    Which is: 0x71c0000a8800
  content::GetFocusedWebContents(guest_web_contents)
    Which is: 0x71c0000a9000
[13637:13637:0129/131744.030413:INFO:chrome_cryptauth_service.cc(231)] Profile is not authenticated yet; waiting before starting CryptAuth managers.
[  FAILED  ] WebViewBrowserPluginInteractiveTest.EnsureFocusSynced, where TypeParam =  and GetParam() =  (5868 ms)

Example failures:
https://ci.chromium.org/buildbot/chromium.memory/Linux%20MSan%20Tests/7559
https://ci.chromium.org/buildbot/chromium.memory/Linux%20MSan%20Tests/7562