Disable failing perf unit tests on chromeos.

tools/perf/measurements/blink_style_unittest.py

 # 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.
 
 from measurements import blink_style
 
+from telemetry import decorators
 from telemetry.unittest_util import options_for_unittests
 from telemetry.unittest_util import page_test_test_case
 
 
 class BlinkStyleTest(page_test_test_case.PageTestTestCase):
   """Smoke test for Bink Style measurements.
 
      Runs BlinkStyle measurement on some simple pages and verifies
      that expected metrics were added to the results.  The test is purely
      functional, i.e. it only checks if the metrics are present and non-zero.
   """
 
   def setUp(self):
     self._options = options_for_unittests.GetCopy()
 
+  @decorators.Disabled('chromeos')  # crbug.com/483212
   def testForParsing(self):
     ps = self.CreatePageSetFromFileInUnittestDataDir('blink_style.html')
     measurement = blink_style.BlinkStyle()
     results = self.RunMeasurement(measurement, ps, options=self._options)
     self.assertEquals(0, len(results.failures))
 
     def getMetric(results, name):
       metrics = results.FindAllPageSpecificValuesNamed(name)
       self.assertEquals(1, len(metrics))
       return metrics[0].value
 
     self.assertGreater(getMetric(results, 'parse_css_regular'), 0)
     self.assertGreater(getMetric(results, 'tokenize_css_regular'), 0)
     self.assertGreater(getMetric(results, 'update_style'), 0)