Disable page_cycler.intl_ko_th_vi.referehce on Mac 10.*

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 8ee83f2c5d2f0a95774510b6c22d9517b57a8e4c..e32ab036933de4097708405799119177c0c4c842 100644
--- a/tools/perf/benchmarks/page_cycler.py
+++ b/tools/perf/benchmarks/page_cycler.py
@@ -119,9 +119,12 @@ class PageCyclerIntlKoThVi(_PageCycler):
     return 'page_cycler.intl_ko_th_vi'
 
   @classmethod
-  def ShouldDisable(cls, possible_browser):  # http://crbug.com/597656
-      return (possible_browser.browser_type == 'reference' and
-              possible_browser.platform.GetDeviceTypeName() == 'Nexus 5X')
+  def ShouldDisable(cls, possible_browser):
+    # http://crbug.com/597656 (Android Nexus 5X).
+    # http://crbug.com/605543 (Mac Snow Leopard).
+    return (possible_browser.browser_type == 'reference' and (
+              possible_browser.platform.GetDeviceTypeName() == 'Nexus 5X' or
+              possible_browser.platform.GetOSVersionName() == 'snowleopard'))
 
 
 class PageCyclerMorejs(_PageCycler):