Import wpt@9ddcc7352bdf590d60535d7cf3ff222cc98441fe

Using wpt-import in Chromium 86c236cc03f2392399dabdf3f101309ab20d42f8.
With Chromium commits locally applied on WPT:
c4dc34414b "[WPT] Reland Upload a test for sending mouse events with key pressed"
fec827fb2a "Added wpt tests for overscroll customization."
c9077e391a "Restore original tail-processing for ScriptProcessor and AudioWorklet"
d814fafce0 "Check for detached ArrayBuffers in Web Bluetooth writeValue functions"
64cbdf7a9e "Replace originOffset public member with getOffsetReferenceSpace method"
e90c6ef049 "NG/DL: Implement size containment (and display lock) for NG fieldset algo"
c4fa33ec83 "CSS: WPT for scroll-padding computed value"


Note to sheriffs: This CL imports external tests and adds
expectations for those tests; if this CL is large and causes
a few new failures, please fix the failures by adding new
lines to TestExpectations rather than reverting. See:
https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_platform_tests.md

Directory owners for changes in this CL:
eae@chromium.org, szager@chromium.org:
  external/wpt/intersection-observer

NOAUTOREVERT=true
TBR=robertma

No-Export: true
Change-Id: I611f3371be6c1db3395df3709480fd241b005819
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1619206
Reviewed-by: WPT Autoroller <wpt-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: WPT Autoroller <wpt-autoroller@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#661334}
44 files changed