Fix the repaint disabling decorator to be consistent with Telemetry disabling style

tools/perf/measurements/repaint_unittest.py

Index: tools/perf/measurements/repaint_unittest.py
diff --git a/tools/perf/measurements/repaint_unittest.py b/tools/perf/measurements/repaint_unittest.py
index e6f20a14d8c46c5cf4ff1291ae8ed7ee27f9410b..83c7f13f3c97a21579640b5efbfa2d8f6a3cde12 100644
--- a/tools/perf/measurements/repaint_unittest.py
+++ b/tools/perf/measurements/repaint_unittest.py
@@ -2,8 +2,6 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import unittest
-
 from telemetry import decorators
 from telemetry.page import page as page_module
 from telemetry.testing import options_for_unittests
@@ -37,7 +35,7 @@ class RepaintUnitTest(page_test_test_case.PageTestTestCase):
     self._options.browser_options.wpr_mode = wpr_modes.WPR_OFF
 
   # Previously this test was disabled on chromeos, see crbug.com/483212.
-  @unittest.skip("flaky") # crbug.com/715962
+  @decorators.Disabled("all") # crbug.com/715962
   def testRepaint(self):
     ps = self.CreateEmptyPageSet()
     ps.AddStory(TestRepaintPage(ps, ps.base_dir))