Revert of Disable page_cycler.basic_oopif on zenbook bot

tools/perf/benchmarks/page_cycler.py

Index: tools/perf/benchmarks/page_cycler.py
diff --git a/tools/perf/benchmarks/page_cycler.py b/tools/perf/benchmarks/page_cycler.py
index 6ec56f1d13daccbadeb0b1aa525570f80359acce..c6d3764bf0edfa5b90f39fdddb9f717064cbf430 100644
--- a/tools/perf/benchmarks/page_cycler.py
+++ b/tools/perf/benchmarks/page_cycler.py
@@ -1,8 +1,6 @@
 # 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 os
 
 from core import perf_benchmark
 
@@ -252,11 +250,6 @@
   def SetExtraBrowserOptions(self, options):
     options.AppendExtraBrowserArgs(['--site-per-process'])
 
-  @classmethod
-  def ShouldDisable(cls, possible_browser):  # http://crbug.com/596067
-    # This test is flaky on Zenbook laptops in the Chromium perf lab.
-    return 'Zenbook' in os.getenv('BUILDBOT_BUILDERNAME', '')
-
 
 @benchmark.Disabled('reference')  # crbug.com/523346
 class PageCyclerBasicOopif(_PageCycler):