[Android] Add UMA for pull-to-refresh activation

tools/metrics/actions/extract_actions.py

 #!/usr/bin/env python
 #
 # 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.
 
 """Extract UserMetrics "actions" strings from the Chrome source.
 
 This program generates the list of known actions we expect to see in the
 user behavior logs.  It walks the Chrome source, looking for calls to
@@ skipping 269 matching lines @@
   actions.add('MobileNTPSwitchToIncognito')
   actions.add('MobileNTPSwitchToMostVisited')
   actions.add('MobileNTPSwitchToOpenTabs')
   actions.add('MobileNewTabOpened')
   actions.add('MobileOmniboxSearch')
   actions.add('MobileOmniboxVoiceSearch')
   actions.add('MobileOmniboxRefineSuggestion')
   actions.add('MobilePageLoaded')
   actions.add('MobilePageLoadedDesktopUserAgent')
   actions.add('MobilePageLoadedWithKeyboard')
+  actions.add('MobilePullGestureReload')
   actions.add('MobileReceivedExternalIntent')
   actions.add('MobileRendererCrashed')
   actions.add('MobileShortcutAllBookmarks')
   actions.add('MobileShortcutFindInPage')
   actions.add('MobileShortcutNewIncognitoTab')
   actions.add('MobileShortcutNewTab')
   actions.add('MobileSideSwipeFinished')
   actions.add('MobileStackViewCloseTab')
   actions.add('MobileStackViewSwipeCloseTab')
   actions.add('MobileTabClobbered')
@@ skipping 513 matching lines @@
 
   with open(actions_xml_path, 'wb') as f:
     f.write(pretty)
   print ('Updated %s. Don\'t forget to add it to your changelist' %
          actions_xml_path)
   return 0
 
 
 if '__main__' == __name__:
   sys.exit(main(sys.argv))