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
 from telemetry.core import exceptions
 
 DEFAULT_TAB_TIMEOUT = 60
@@ skipping 256 matching lines @@
         if (window.chrome && chrome.benchmarking &&
             chrome.benchmarking.clearCache) {
           chrome.benchmarking.clearCache();
           chrome.benchmarking.clearPredictorCache();
           chrome.benchmarking.clearHostResolverCache();
         }
     """)
     if force:
       self.Navigate('about:blank')
 
   def ClearDataForOrigin(self, url, timeout=DEFAULT_TAB_TIMEOUT):

[nednguyen, 2017/09/22 11:11:31]

I will make a CL to refactor this to inspector_backend as well

     """Clears storage data for the origin of url.
 
     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
     """
     res = self._inspector_backend._websocket.SyncRequest({
         'method': 'Storage.clearDataForOrigin',
         'params': {
             'origin': url,
             'storageTypes': 'all'
         }
     }, timeout)
     if 'error' in res:
       raise exceptions.StoryActionError(res['error']['message'])
+
+  def EnableServiceWorker(self, timeout=DEFAULT_TAB_TIMEOUT):

[nednguyen, 2017/09/22 11:07:34]

Can you move these to inspector_backend? Then these two methods just call:
inspector_backend.EnableServiceWorker & inspector_backend.StopServiceWorker 

[yukiy, 2017/09/25 01:23:13]

Done.

+    """Enables devtools for ServiceWorker domain.
+
+    Raises:
+      exceptions.StoryActionError
+    """
+    res = self._inspector_backend._websocket.SyncRequest({
+        'method': 'ServiceWorker.enable'
+    }, timeout)
+    if 'error' in res:
+      raise exceptions.StoryActionError(res['error']['message'])
+
+  def StopServiceWorker(self, timeout=DEFAULT_TAB_TIMEOUT):
+    """Stops all service workers.
+
+    Raises:
+      exceptions.StoryActionError
+    """
+    res = self._inspector_backend._websocket.SyncRequest({
+        'method': 'ServiceWorker.stopAllWorkers'
+    }, timeout)
+    if 'error' in res:
+      raise exceptions.StoryActionError(res['error']['message'])