[telemetry] Disable power and smoke unit tests on Mac 10.9.

tools/perf/benchmarks/benchmark_smoke_unittest.py

Index: tools/perf/benchmarks/benchmark_smoke_unittest.py
diff --git a/tools/perf/benchmarks/benchmark_smoke_unittest.py b/tools/perf/benchmarks/benchmark_smoke_unittest.py
index bed257ebb9736c0a777a899a4fc23aed7018d43f..ca454d72f464e4e22d13134ce1e8840349e5f06f 100644
--- a/tools/perf/benchmarks/benchmark_smoke_unittest.py
+++ b/tools/perf/benchmarks/benchmark_smoke_unittest.py
@@ -26,7 +26,9 @@ def SmokeTestGenerator(benchmark):
   # failing or flaky benchmark would disable a much wider swath of coverage
   # than is usally intended. Instead, if a particular benchmark is failing,
   # disable it in tools/perf/benchmarks/*.
-  @benchmark_module.Disabled('chromeos')  # crbug.com/351114
+
+  # EXCEPTIONS TO THE ABOVE RULE: crbug.com/351114, crbug.com/423688
+  @benchmark_module.Disabled('chromeos', 'mavericks')
   def BenchmarkSmokeTest(self):
     # Only measure a single page so that this test cycles reasonably quickly.
     benchmark.options['pageset_repeat'] = 1