[Perf] Disable scheduler.tough_scheduling_cases on reference build

tools/perf/benchmarks/scheduler.py

Index: tools/perf/benchmarks/scheduler.py
diff --git a/tools/perf/benchmarks/scheduler.py b/tools/perf/benchmarks/scheduler.py
index 294ff8da2f1527a2ccc9c7bf7875d8d61f8c58cf..4d10529c7c819de4b291e9310f9d397701977de3 100644
--- a/tools/perf/benchmarks/scheduler.py
+++ b/tools/perf/benchmarks/scheduler.py
@@ -1,13 +1,15 @@
 # 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.
+from telemetry import benchmark
 
 from core import perf_benchmark
-
 from measurements import smoothness
+
 import page_sets
 
 
+@benchmark.Disabled('reference')  # crbug.com/549428
 class SchedulerToughSchedulingCases(perf_benchmark.PerfBenchmark):
   """Measures rendering statistics while interacting with pages that have
   challenging scheduling properties.