Fix a bug in the test for document.dir.
Add a test for non-support of the layout attribute on tables.
importing Annsik's battery API tests from DAP DCVS repo
import from darobin's tests for DAP vibration API
don't use absolute ref
Update Range tests for changes to the detach() method.
Tests from Navigation Timing
Removed metadata_cache
Move pagevisibility/ to page-visibility/ to match /tr shortnames.
Update format-field-retry.htm

timeout
Update format-field-retry-bogus.htm
Update message.php

empty line at the end of this file makes tests harder to understand
remove interface test helper. We'll use WebIDL now.
refactor bufferLoader to use decodeAudioData
remove unused helpers and add assert_array_approx_equals
add assertions
Add visibility test for hidden parent with visible children

In an overflow context where overflow is hidden, absolutely positioned
child elements are still visible in the browser.  The parent container
is by webdriver also considered visible for the reason of
interactability.
add a longer timeout to the test
remove old assert helpers, they're in testharness.js now.
Merge pull request #247 from andreastt/andreastt/overflow_parent_visible_with_absolute_children

Add visibility test for hidden parent with visible children