Add @DisabledTest decorator

tools/telemetry/telemetry/unittest/__init__.py

Index: tools/telemetry/telemetry/unittest/__init__.py
diff --git a/tools/telemetry/telemetry/unittest/__init__.py b/tools/telemetry/telemetry/unittest/__init__.py
index 96196cffb2720d69ac46a41dd9bb9f4005bcfa9e..053e441dc6367e6ac2d61ba6077c60c4007bb423 100644
--- a/tools/telemetry/telemetry/unittest/__init__.py
+++ b/tools/telemetry/telemetry/unittest/__init__.py
@@ -1,3 +1,12 @@
 # Copyright (c) 2012 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.
+def RequiresBrowserOfType(*types):
+  def wrap(func):
+    func._requires_browser_types = types
+    return func
+  return wrap
+
+def DisabledTest(func):
+  func._disabled_test = True
+  return func