Disable lacros_chrome_browsertests for device.

These tests only run on Linux, not on ChromeOS devices.

Change-Id: If22d19f0cdcb95efd412d7c099df05361413350f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2419007
Commit-Queue: Erik Chen <erikchen@chromium.org>
Commit-Queue: Avi Drissman <avi@chromium.org>
Auto-Submit: Erik Chen <erikchen@chromium.org>
Reviewed-by: Avi Drissman <avi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#808521}

chrome/test/BUILD.gn

@@ -4,6 +4,7 @@
 
 import("//build/config/buildflags_paint_preview.gni")
 import("//build/config/chrome_build.gni")
+import("//build/config/chromeos/args.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
@@ -3045,9 +3046,10 @@ if (!is_android) {
   }
 }
 
-if (chromeos_is_browser_only) {
+if (chromeos_is_browser_only && !is_chromeos_device) {
   # This test target is intended for lacros chrome specific tests that depend
   # on crosapi, for generic tests, please use 'browser_tests' target instead.
+  # These tests only run on Linux.
   test("lacros_chrome_browsertests") {
     use_xvfb = use_xvfb_in_this_config