re-enable startup benchmarks on Android

(trybots are probably useless anyway)

Review URL: https://codereview.chromium.org/399053004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@284151 0039d316-1c4b-4281-b951-d872f2087c98

tools/perf/benchmarks/startup.py

@@ -7,7 +7,8 @@ import page_sets
 from telemetry import benchmark
 
 
-@benchmark.Disabled('android', 'snowleopard') # crbug.com/336913
+@benchmark.Enabled('has tabs')
+@benchmark.Disabled('snowleopard') # crbug.com/336913
 class StartupColdBlankPage(benchmark.Benchmark):
   tag = 'cold'
   test = startup.Startup