Flip Linux ChromeOS trybot to GN

testing/buildbot/gn_isolate_map.pyl

 ## Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # gn_isolate_map.pyl - A mapping of Ninja build target names to GN labels and
 # test type classifications for the tests that are run on the bots.
 #
 # This mapping is used by MB so that we can uniformly refer to test binaries
 # by their Ninja target names in the recipes and not need to worry about how
 # they are referred to in GN or GYP specifically (the GYP target name is pretty
@@ skipping 171 matching lines @@
   "chrome_elf_unittests": {
     "label": "//chrome_elf:chrome_elf_unittests",
     "type": "raw",
   },
   "chromedriver_unittests": {
     "label": "//chrome/test/chromedriver:chromedriver_unittests",
     "type": "windowed_test_launcher",
   },
   "chromeos_unittests": {
     "label": "//chromeos:chromeos_unittests",
-    "type": "unknown",
+    "type": "console_test_launcher",
   },
   "components_browsertests": {
     "label": "//components:components_browsertests",
     "type": "windowed_test_launcher",
   },
   "components_unittests": {
     "label": "//components:components_unittests",
     "type": "windowed_test_launcher",
   },
   "compositor_unittests": {
@@ skipping 359 matching lines @@
   },
   "wm_unittests": {
     "label": "//ui/wm:wm_unittests",
     "type": "windowed_test_launcher",
   },
   "wtf_unittests": {
     "label": "//third_party/WebKit/Source/wtf:wtf_unittests",
     "type": "console_test_launcher",
   },
 }