Revert of [Android][Telemetry] Disable failing key_mobile_sites benchmarks.

tools/perf/benchmarks/oilpan_gc_times.py

 # Copyright 2014 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
 
 from benchmarks import blink_perf
 from benchmarks import silk_flags
@@ skipping 30 matching lines @@
 @benchmark.Enabled('android')
 class OilpanGCTimesKeySilkCases(perf_benchmark.PerfBenchmark):
   test = oilpan_gc_times.OilpanGCTimesForSmoothness
   page_set = page_sets.KeySilkCasesPageSet
 
   @classmethod
   def Name(cls):
     return 'oilpan_gc_times.key_silk_cases'
 
 
-@benchmark.Disabled('all') # crbug.com/702194
-#@benchmark.Enabled('android')
+@benchmark.Enabled('android')
 class OilpanGCTimesSyncScrollKeyMobileSites(perf_benchmark.PerfBenchmark):
   tag = 'sync_scroll'
   test = oilpan_gc_times.OilpanGCTimesForSmoothness
   page_set = page_sets.KeyMobileSitesSmoothPageSet
 
   def SetExtraBrowserOptions(self, options):
     silk_flags.CustomizeBrowserOptionsForSyncScrolling(options)
 
   @classmethod
   def Name(cls):
     return 'oilpan_gc_times.sync_scroll.key_mobile_sites_smooth'
 
   @classmethod
   def ShouldDisable(cls, possible_browser):  # http://crbug.com/597656
       return (possible_browser.browser_type == 'reference' and
               possible_browser.platform.GetDeviceTypeName() == 'Nexus 5X')