Add tab.StopAllServiceWorkers()

telemetry/telemetry/internal/browser/tab.py

 # Copyright 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.
 
 from telemetry.internal.actions import action_runner
 from telemetry.internal.browser import web_contents
 from telemetry.internal.image_processing import video
 
 DEFAULT_TAB_TIMEOUT = 60
 
@@ skipping 267 matching lines @@
 
     With assigning 'all' to params.storageTypes, Storage.clearDataForOrigin
     clears all storage of app cache, cookies, file systems, indexed db,
     local storage, shader cache, web sql, service workers and cache storage.
     See StorageHandler::ClearDataForOrigin() for more details.
 
     Raises:
       exceptions.StoryActionError
     """
     return self._inspector_backend.ClearDataForOrigin(url, timeout)
+
+  def StopAllServiceWorkers(self, timeout=DEFAULT_TAB_TIMEOUT):
+    """Stops all service workers.
+
+    Raises:
+      exceptions.StoryActionError
+    """
+    return self._inspector_backend.StopAllServiceWorkers(timeout)