2 flaky autopilot tests on touch devices

Traceback for the first failure, which I’m observing even more often than the second one:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/webbrowser_app/tests/test_new_tab_view.py", line 317, in test_remove_bookmarks_when_collapsed
    self._remove_first_bookmark()
  File "/usr/lib/python3/dist-packages/webbrowser_app/tests/test_new_tab_view.py", line 291, in _remove_first_bookmark
    Eventually(NotEquals(url)))
  File "/usr/lib/python3/dist-packages/testtools/testcase.py", line 421, in assertThat
    mismatch_error = self._matchHelper(matchee, matcher, message, verbose)
  File "/usr/lib/python3/dist-packages/testtools/testcase.py", line 471, in _matchHelper
    mismatch = matcher.match(matchee)
  File "/usr/lib/python3/dist-packages/autopilot/matchers/__init__.py", line 111, in match
    wait_fun(self.matcher, self.timeout)
  File "/usr/lib/python3/dist-packages/autopilot/matchers/__init__.py", line 127, in _callable_wait_for
    new_value = refresh_fn()
  File "/usr/lib/python3/dist-packages/webbrowser_app/tests/test_new_tab_view.py", line 290, in <lambda>
    lambda: self.new_tab_view.get_bookmark_delegates()[1].url,
  File "/usr/lib/python3/dist-packages/webbrowser_app/emulators/browser.py", line 605, in get_bookmark_delegates
    key=lambda delegate: delegate.globalRect.y)
  File "/usr/lib/python3/dist-packages/webbrowser_app/emulators/browser.py", line 605, in <lambda>
    key=lambda delegate: delegate.globalRect.y)
  File "/usr/lib/python3/dist-packages/autopilot/introspection/dbus.py", line 411, in __getattr__
    self.refresh_state()
  File "/usr/lib/python3/dist-packages/autopilot/introspection/dbus.py", line 367, in refresh_state
    _, new_state = self._get_new_state()
  File "/usr/lib/python3/dist-packages/autopilot/introspection/dbus.py", line 429, in _get_new_state
    raise StateNotFoundError(self.__class__.__name__, id=self.id)
autopilot.exceptions.StateNotFoundError: Object not found with name 'UrlDelegate' and properties {'id': 47}.

This bug was fixed in the package webbrowser-app - 0.23+16.10.20160701.1-0ubuntu1

---------------
webbrowser-app (0.23+16.10.20160701.1-0ubuntu1) yakkety; urgency=medium

  * Generate UA override list files at build time to un-hardcode ubuntu
    and chromium version numbers. (LP: #1591220)
  * Fix one flaky autopilot test. (LP: #1591120)
  * Temporarily skip tests on arm64 to unblock package build without
    oxide. (LP: #1585942)
  * Update the target that lists non-compiled files.

 -- Olivier Tilloy <email address hidden> Fri, 01 Jul 2016 13:10:14 +0000

Re-opening as the branch merged fixes only the first of the two flaky test, the second one (webbrowser_app.tests.test_tabs.TestTabsView.test_error_only_for_current_tab) remains flaky.