Propagate decorators properly in telemetry_perf_unittests.

tools/perf/benchmarks/benchmark_smoke_unittest.py

 # Copyright 2014 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.
 
 """Run the first page of one benchmark for every module.
 
 Only benchmarks that have a composable measurement are included.
 Ideally this test would be comprehensive, however, running one page
 of every benchmark would run impractically long.
 """
@@ skipping 76 matching lines @@
     if (benchmark.Name().startswith('session_restore') or
         benchmark.Name().startswith('skpicture_printer')):
       continue
 
     if hasattr(benchmark, 'generated_profile_archive'):
       # We'd like to test these, but don't know how yet.
       continue
 
     class BenchmarkSmokeTest(unittest.TestCase):
       pass
-    setattr(BenchmarkSmokeTest, benchmark.Name(), SmokeTestGenerator(benchmark))
+
+    method = SmokeTestGenerator(benchmark)
+
+    # Make sure any decorators are propagated from the original declaration.
+    # (access to protected members) pylint: disable=W0212
+    # TODO(dpranke): Since we only pick the first test from every class
+    # (above), if that test is disabled, we'll end up not running *any*
+    # test from the class. We should probably discover all of the tests
+    # in a class, and then throw the ones we don't need away instead.
+    if hasattr(benchmark, '_enabled_strings'):
+      method._enabled_strings = benchmark._enabled_strings
+    if hasattr(benchmark, '_disabled_strings'):
+      method._disabled_strings = benchmark._disabled_strings
+    setattr(BenchmarkSmokeTest, benchmark.Name(), method)
+
     suite.addTest(BenchmarkSmokeTest(benchmark.Name()))
 
   return suite