Re-enable session_restore on mac

tools/perf/benchmarks/session_restore.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 session_restore
 import page_sets
 from profile_creators import profile_generator
 from profile_creators import small_profile_extender
@@ skipping 44 matching lines @@
     story_set = self.page_set()
     for story in story_set.stories[1:]:
       story_set.RemoveStory(story)
     return story_set
 
   def CreatePageTest(self, options):
     is_cold = (self.tag == 'cold')
     return session_restore.SessionRestore(cold=is_cold)
 
 # crbug.com/325479, crbug.com/381990, crbug.com/511273
-@benchmark.Disabled('android', 'linux', 'reference', 'mac')
+@benchmark.Disabled('android', 'linux', 'reference')
 class SessionRestoreColdTypical25(_SessionRestoreTypical25):
   """Test by clearing system cache and profile before repeats."""
   tag = 'cold'
   options = {'pageset_repeat': 5}
 
   @classmethod
   def Name(cls):
     return 'session_restore.cold.typical_25'
 
 
 # crbug.com/325479, crbug.com/381990, crbug.com/511273
-@benchmark.Disabled('android', 'linux', 'reference', 'xp', 'mac')
+@benchmark.Disabled('android', 'linux', 'reference', 'xp')
 class SessionRestoreWarmTypical25(_SessionRestoreTypical25):
   """Test without clearing system cache or profile before repeats.
 
   The first result is discarded.
   """
   tag = 'warm'
   options = {'pageset_repeat': 20}
 
   @classmethod
   def Name(cls):
     return 'session_restore.warm.typical_25'