[Telemetry] Disable session_restore.{cold,warm}.startup_pages on 10.6

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.
 
 import os
 import tempfile
 
 from measurements import session_restore
 from measurements import session_restore_with_url
 import page_sets
@@ skipping 30 matching lines @@
 
 @benchmark.Disabled('android', 'linux')  # crbug.com/325479, crbug.com/381990
 class SessionRestoreWarmTypical25(_SessionRestoreTest):
   tag = 'warm'
   test = session_restore.SessionRestore
   page_set = page_sets.Typical25PageSet
   options = {'warm': True,
              'pageset_repeat': 20}
 
 
-@benchmark.Disabled('android', 'linux')  # crbug.com/325479, crbug.com/381990
+# crbug.com/325479, crbug.com/381990, crbug.com/405386
+@benchmark.Disabled('android', 'linux', 'snowleopard')
 class SessionRestoreWithUrlCold(_SessionRestoreTest):
   """Measure Chrome cold session restore with startup URLs."""
   tag = 'cold'
   test = session_restore_with_url.SessionRestoreWithUrl
   page_set = page_sets.StartupPagesPageSet
   options = {'cold': True,
              'pageset_repeat': 5}
 
 
-@benchmark.Disabled('android', 'linux')  # crbug.com/325479, crbug.com/381990
+# crbug.com/325479, crbug.com/381990, crbug.com/405386
+@benchmark.Disabled('android', 'linux', 'snowleopard')
 class SessionRestoreWithUrlWarm(_SessionRestoreTest):
   """Measure Chrome warm session restore with startup URLs."""
   tag = 'warm'
   test = session_restore_with_url.SessionRestoreWithUrl
   page_set = page_sets.StartupPagesPageSet
   options = {'warm': True,
              'pageset_repeat': 10}