Disable testUnregisterDomainWithUnregisteredDomain on chromeos.

tools/telemetry/telemetry/core/user_agent_unittest.py

Index: tools/telemetry/telemetry/core/user_agent_unittest.py
diff --git a/tools/telemetry/telemetry/core/user_agent_unittest.py b/tools/telemetry/telemetry/core/user_agent_unittest.py
index b5160b00d0ac24626cf1e2ff9f689d58d477ec67..d0539fa133b7e343d43a3342c7b7b4e8c540da83 100644
--- a/tools/telemetry/telemetry/core/user_agent_unittest.py
+++ b/tools/telemetry/telemetry/core/user_agent_unittest.py
@@ -2,6 +2,7 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+from telemetry import decorators
 from telemetry.core import user_agent
 from telemetry.unittest_util import tab_test_case
 
@@ -11,6 +12,7 @@ class MobileUserAgentTest(tab_test_case.TabTestCase):
   def CustomizeBrowserOptions(cls, options):
     options.browser_user_agent_type = 'mobile'
 
+  @decorators.Disabled('chromeos')  # crbug.com/483212
   def testUserAgent(self):
     ua = self._tab.EvaluateJavaScript('window.navigator.userAgent')
     self.assertEquals(ua, user_agent.UA_TYPE_MAPPING['mobile'])
@@ -20,6 +22,7 @@ class TabletUserAgentTest(tab_test_case.TabTestCase):
   def CustomizeBrowserOptions(cls, options):
     options.browser_user_agent_type = 'tablet'
 
+  @decorators.Disabled('chromeos')  # crbug.com/483212
   def testUserAgent(self):
     ua = self._tab.EvaluateJavaScript('window.navigator.userAgent')
     self.assertEquals(ua, user_agent.UA_TYPE_MAPPING['tablet'])
@@ -29,6 +32,7 @@ class DesktopUserAgentTest(tab_test_case.TabTestCase):
   def CustomizeBrowserOptions(cls, options):
     options.browser_user_agent_type = 'desktop'
 
+  @decorators.Disabled('chromeos')  # crbug.com/483212
   def testUserAgent(self):
     ua = self._tab.EvaluateJavaScript('window.navigator.userAgent')
     self.assertEquals(ua, user_agent.UA_TYPE_MAPPING['desktop'])