WPT import https://crrev.com/c/1174104 introduced new failures in external/wpt/svg:

List of new failures:
external/wpt/svg/idlharness.window.html new failing tests: https://crrev.com/c/1174104/4/third_party/WebKit/LayoutTests/external/wpt/svg/idlharness.window-expected.txt

This import contains upstream changes from dba431554f1256e84dd3500f91d86b755fbced3f to a0b9a04105aab5ffd508dfa6ad933641ea6448e0:
move DelayNode channelCount test to wpt: https://github.com/web-platform-tests/wpt/commit/a0b9a04105aab5ffd508dfa6ad933641ea6448e0
Update interfaces/background-fetch.idl (#12471): https://github.com/web-platform-tests/wpt/commit/e60cc4f1ba974b2f5b51e8e68acc0c2eea7b093b
Update interfaces/SVG.idl (#12470): https://github.com/web-platform-tests/wpt/commit/5251260ad7362fe2481749f9d78ca52f6a238de3
Update interfaces/webrtc.idl (#12468): https://github.com/web-platform-tests/wpt/commit/3089d2ac154fd0360e03cfaa93b38c26cbbba807
Update interfaces/css-paint-api.idl (#12469): https://github.com/web-platform-tests/wpt/commit/5831a844ca9a9d5121fd4c45308e88a02d40ecf6