Update from https://crrev.com/305340

testing/buildbot/chromium_trybot.json

 {
   "compile_targets": [
     "all"
   ],
   "gtest_tests": [
     "accessibility_unittests",
     {
       "test": "app_installer_unittests",
       "platforms": ["win"]
     },
@@ skipping 147 matching lines @@
     },
     "sync_unit_tests",
     "ui_base_unittests",
     {
       "test": "unit_tests",
       "swarming": {
         "can_use_on_swarming_builders": true,
         "shards": 2
       }
     },
+    {
+      "test": "ui_chromeos_unittests",
+      "platforms": ["linux"],
+      "chromium_configs": [
+        "chromium_chromeos",
+        "chromium_chromeos_clang",
+        "chromium_chromeos_ozone"
+      ]
+    },
     "url_unittests",
     {
       "test": "wm_unittests",
       "platforms": ["linux", "win"]
     },
     {
       "test": "app_shell_browsertests",
       "platforms": ["linux", "win"]
     },
     {
@@ skipping 52 matching lines @@
   "non_filter_tests_builders": [
   ],
 
   "filter_compile_builders": [
     "win_chromium_compile_dbg",
     "win_chromium_rel_swarming",
     "win_chromium_x64_rel_swarming",
     "win8_chromium_rel"
   ]
 }