[Telemetry] Allows concatenating multiple Disabled & Enabled decorators

tools/perf/benchmarks/blink_perf.py

 # Copyright 2013 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.
 
 import os
 
 from core import path_util
 from core import perf_benchmark
 
 from telemetry import benchmark
@@ skipping 290 matching lines @@
   @classmethod
   def Name(cls):
     return 'blink_perf.shadow_dom'
 
   def CreateStorySet(self, options):
     path = os.path.join(BLINK_PERF_BASE_DIR, 'ShadowDOM')
     return CreateStorySetFromPath(path, SKIPPED_FILE)
 
 
 # This benchmark is for local testing, doesn't need to run on bots.
-@benchmark.Disabled()
+@benchmark.Disabled('all')
 class BlinkPerfXMLHttpRequest(perf_benchmark.PerfBenchmark):
   tag = 'xml_http_request'
   test = _BlinkPerfMeasurement
 
   @classmethod
   def Name(cls):
     return 'blink_perf.xml_http_request'
 
   def CreateStorySet(self, options):
     path = os.path.join(BLINK_PERF_BASE_DIR, 'XMLHttpRequest')
     return CreateStorySetFromPath(path, SKIPPED_FILE)
 
 
 # Disabled on Windows and ChromeOS due to https://crbug.com/521887
 # Disabled on reference builds due to https://crbug.com/530374
 @benchmark.Disabled('win', 'chromeos', 'reference')
 class BlinkPerfPywebsocket(perf_benchmark.PerfBenchmark):
   tag = 'pywebsocket'
   test = _BlinkPerfPywebsocketMeasurement
 
   @classmethod
   def Name(cls):
     return 'blink_perf.pywebsocket'
 
   def CreateStorySet(self, options):
     path = os.path.join(BLINK_PERF_BASE_DIR, 'Pywebsocket')
     return CreateStorySetFromPath(path, SKIPPED_FILE,
         shared_page_state_class=_SharedPywebsocketPageState)