WPT import https://crrev.com/c/1162717 introduced new failures in external/wpt/webrtc:

List of new failures:
virtual/webrtc-wpt-unified-plan/external/wpt/webrtc/idlharness.https.window.html new failing tests: https://crrev.com/c/1162717/4/third_party/WebKit/LayoutTests/virtual/webrtc-wpt-unified-plan/external/wpt/webrtc/idlharness.https.window-expected.txt
external/wpt/webrtc/idlharness.https.window.html new failing tests: https://crrev.com/c/1162717/4/third_party/WebKit/LayoutTests/external/wpt/webrtc/idlharness.https.window-expected.txt
external/wpt/webrtc/idlharness.https.window.html new failing tests: https://crrev.com/c/1162717/4/third_party/WebKit/LayoutTests/virtual/webrtc-wpt-unified-plan/external/wpt/webrtc/idlharness.https.window-expected.txt

This import contains upstream changes from 79f585c4b5c1391a62e94b87bfb5f89719e82e99 to 1413fe6af9472fe030b368e3297e6f618797cec3:
Auto-update the webrtc IDL file + test (#11700): https://github.com/web-platform-tests/wpt/commit/1413fe6af9472fe030b368e3297e6f618797cec3 [affecting this directory]
[wdspec] Add remaining unhandled prompt behavior tests to existent user prompt tests.: https://github.com/web-platform-tests/wpt/commit/e2ecba285ca6a9e7c885ab930fb0eca6a7d00499
Send click event to the nearest common ancestor: https://github.com/web-platform-tests/wpt/commit/2cf37dcc491a8e0774f81c2208ff0470829ba178