Disable page_cycler_v2 on N6 webview

tools/perf/benchmarks/page_cycler_v2.py

 # Copyright 2016 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.
 
 """The page cycler v2.
 
 For details, see design doc:
 https://docs.google.com/document/d/1EZQX-x3eEphXupiX-Hq7T4Afju5_sIdxPWYetj7ynd0
 """
 
@@ skipping 37 matching lines @@
   def ShouldDisable(cls, possible_browser):
     # crbug.com/619254
     if possible_browser.browser_type == 'reference':
       return True
 
     # crbug.com/616781
     if (cls.IsSvelte(possible_browser) or
         possible_browser.platform.GetDeviceTypeName() == 'Nexus 5X' or
         possible_browser.platform.GetDeviceTypeName() == 'AOSP on BullHead'):
       return True
+
+    # crbug.com/651188
+    if (possible_browser.platform.GetDeviceTypeName() == 'Nexus 6' and
+        possible_browser.browser_type == 'android-webview'):
+      return True
+
     return False
 
 
 class PageCyclerV2Typical25(_PageCyclerV2):
   """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.
   """
 
@@ skipping 140 matching lines @@
   set, without running in out-of-process iframes mode.. """
   page_set = page_sets.OopifBasicPageSet
 
   @classmethod
   def Name(cls):
     return 'page_cycler_v2.basic_oopif'
 
   def CreateStorySet(self, options):
     return page_sets.OopifBasicPageSet(cache_temperatures=[
           cache_temperature.PCV1_COLD, cache_temperature.PCV1_WARM])