[PerfBotSherrif] Rename OS name for disabled startup benchmark

tools/perf/benchmarks/startup.py

Index: tools/perf/benchmarks/startup.py
diff --git a/tools/perf/benchmarks/startup.py b/tools/perf/benchmarks/startup.py
index 26a0a0851a389df667b3fb91ee9e6f189870c1b6..74b1f3bfd0c86bb302d7986a2cfaead750cabc98 100644
--- a/tools/perf/benchmarks/startup.py
+++ b/tools/perf/benchmarks/startup.py
@@ -61,7 +61,7 @@ class StartupWarmBlankPage(_StartupWarm):
 
 @benchmark.Disabled('reference',                   # http://crbug.com/476882
                     'android',                     # http://crbug.com/481919
-                    'snowleopard',                 # http://crbug.com/605485
+                    'yosemite',                 # http://crbug.com/605485
                     'content-shell')               # No pregenerated profiles.
 class StartupLargeProfileColdBlankPage(_StartupCold):
   """Measures cold startup time with a large profile."""
@@ -82,7 +82,7 @@ class StartupLargeProfileColdBlankPage(_StartupCold):
 
 @benchmark.Disabled('reference',                   # http://crbug.com/476882
                     'android',                     # http://crbug.com/481919
-                    'snowleopard',                 # http://crbug.com/605485
+                    'yosemite',                 # http://crbug.com/605485
                     'content-shell')               # No pregenerated profiles.
 class StartupLargeProfileWarmBlankPage(_StartupWarm):
   """Measures warm startup time with a large profile."""