Disable smoothness.pathological_mobile_sites on Android Nexus7v2 Perf bot

tools/perf/benchmarks/smoothness.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.
 import multiprocessing
 
 from core import perf_benchmark
 
 from benchmarks import silk_flags
 from measurements import smoothness
 import page_sets
@@ skipping 433 matching lines @@
 @benchmark.Enabled('android')
 class SmoothnessPathologicalMobileSites(_Smoothness):
   """Measures task execution statistics while scrolling pathological sites.
   """
   page_set = page_sets.PathologicalMobileSitesPageSet
 
   @classmethod
   def Name(cls):
     return 'smoothness.pathological_mobile_sites'
 
+  @classmethod
+  def ShouldDisable(cls, possible_browser):
+    # http://crbug.com/685342
+    if possible_browser.platform.GetDeviceTypeName() == 'Nexus 7':
+      return True
+    return False
+
 
 class SmoothnessToughTextureUploadCases(_Smoothness):
   page_set = page_sets.ToughTextureUploadCasesPageSet
 
   @classmethod
   def Name(cls):
     return 'smoothness.tough_texture_upload_cases'
 
 
 class SmoothnessToughAdCases(_Smoothness):
@@ skipping 35 matching lines @@
   """Measures rendering statistics while scrolling advertisements."""
   page_set = page_sets.SyntheticToughWebglAdCasesPageSet
 
   @classmethod
   def Name(cls):
     return 'smoothness.tough_webgl_ad_cases'
 
   @classmethod
   def ShouldDisable(cls, possible_browser):
     return cls.IsSvelte(possible_browser)  # http://crbug.com/574485