Disable some tests on Nexus 5X reference again

tools/perf/benchmarks/page_cycler.py

 # Copyright 2013 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 page_cycler
 import page_sets
 from telemetry import benchmark
 
@@ skipping 208 matching lines @@
 @benchmark.Enabled('android', 'chromeos', 'linux', 'ios', 'mac')
 class PageCyclerTypical25(_PageCycler):
   """Page load time benchmark for a 25 typical web pages.
 
   Designed to represent typical, not highly optimized or highly popular web
   sites. Runs against pages recorded in June, 2014.
   """
   options = {'pageset_repeat': 3}
 
   @classmethod
+  def ShouldDisable(cls, possible_browser):  # http://crbug.com/597656
+    return (possible_browser.browser_type == 'reference' and
+            possible_browser.platform.GetDeviceTypeName() == 'Nexus 5X')
+
+  @classmethod
   def Name(cls):
     return 'page_cycler.typical_25'
 
   def CreateStorySet(self, options):
     return page_sets.Typical25PageSet(run_no_page_interactions=True)
 
 
 @benchmark.Disabled('reference', 'android')
 class PageCyclerBasicOopifIsolated(_PageCycler):
   """ A benchmark measuring performance of out-of-process iframes. """
@@ skipping 18 matching lines @@
     return 'page_cycler.basic_oopif'
 
 
 @benchmark.Disabled('all')  # crbug.com/443730
 class PageCyclerBigJs(_PageCycler):
   page_set = page_sets.BigJsPageSet
 
   @classmethod
   def Name(cls):
     return 'page_cycler.big_js'