[Telemetry] Disable some tests on Nexus 5X reference

tools/perf/benchmarks/blink_style.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 core import perf_benchmark
 
 from measurements import blink_style
 import page_sets
 from telemetry import benchmark
 
@@ skipping 13 matching lines @@
 
 @benchmark.Enabled('android')
 class BlinkStyleKeyMobileSites(perf_benchmark.PerfBenchmark):
   """Measures performance of Blink's style engine (CSS Parsing, Style Recalc,
   etc.) on key mobile sites.
   """
   test = blink_style.BlinkStyle
   page_set = page_sets.KeyMobileSitesPageSet
 
   @classmethod
+  def ShouldDisable(cls, possible_browser):  # http://crbug.com/593152
+    return (possible_browser.browser_type == 'reference' and
+            possible_browser.platform.GetDeviceTypeName() == 'Nexus 5X')
+
+  @classmethod
   def Name(cls):
     return 'blink_style.key_mobile_sites'
 
 
 @benchmark.Enabled('android')
 class BlinkStylePolymer(perf_benchmark.PerfBenchmark):
   """Measures performance of Blink's style engine (CSS Parsing, Style Recalc,
   etc.) for Polymer cases.
   """
   test = blink_style.BlinkStyle
   page_set = page_sets.PolymerPageSet
 
   @classmethod
   def Name(cls):
     return 'blink_style.polymer'