Disable testIFrame temporarily on cros.

BUG=394454
TEST=fyi cros perf bot
NOTRY=True

Review URL: https://codereview.chromium.org/398083004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@283586 0039d316-1c4b-4281-b951-d872f2087c98

tools/telemetry/telemetry/core/backends/chrome/inspector_runtime_unittest.py

@@ -34,7 +34,8 @@ class InspectorRuntimeTest(tab_test_case.TabTestCase):
   def testRuntimeExecuteOfSomethingThatCantJSONize(self):
     self._tab.ExecuteJavaScript('window')
 
-  @decorators.Disabled('android')
+  # TODO(achuith): Fix http://crbug.com/394454 on cros.
+  @decorators.Disabled('android', 'chromeos')
   def testIFrame(self):
     self.Navigate('host.html')