Add expectations for some incoming (flaky) tests

to unblock the importer.

Each test has their corresponding bug filed manually.

TBR=hbos

Bug: 832501, 918663, 918664
Change-Id: I69e94ed84c412ebf744a9a6074d9f158bcf7f4ae
Reviewed-on: https://chromium-review.googlesource.com/c/1393557Reviewed-by: Robert Ma <robertma@chromium.org>
Commit-Queue: Robert Ma <robertma@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619527}

third_party/blink/web_tests/TestExpectations

@@ -3204,6 +3204,14 @@ crbug.com/893490 [ Mac ] external/wpt/css/css-text/white-space/control-chars-09F
 crbug.com/893480 external/wpt/infrastructure/testdriver/actions/elementTiming.html [ Timeout ]
 crbug.com/893480 external/wpt/infrastructure/testdriver/actions/multiDevice.html [ Failure Timeout ]
 
+# wpt-importer has trouble rebaselining these tests. They might be flaky?
+crbug.com/832501 external/wpt/webrtc/RTCPeerConnection-track-stats.https.html [ Failure ]
+crbug.com/832501 virtual/webrtc-wpt-unified-plan/external/wpt/webrtc/RTCPeerConnection-track-stats.https.html [ Failure ]
+
+# Hit a DCHECK
+crbug.com/918663 virtual/layout_ng_experimental/external/wpt/css/css-multicol/multicol-span-all-006.html [ Failure Crash ]
+crbug.com/918664 external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/sizing/block-size-with-min-or-max-content-table-1a.html [ Failure Pass ]
+
 # ====== New tests from wpt-importer added here ======
 crbug.com/626703 external/wpt/css/filter-effects/filter-subregion-01.html [ Failure ]
 crbug.com/626703 external/wpt/webrtc/RTCTrackEvent-fire.html [ Timeout ]

third_party/blink/web_tests/external/wpt/webrtc/RTCPeerConnection-track-stats.https-expected.txt

-This is a testharness.js-based test.
-PASS addTrack() without setLocalDescription() yields track stats
-PASS addTrack() without setLocalDescription() yields media stream stats
-PASS addTrack() with setLocalDescription() yields track stats
-PASS addTrack() with setLocalDescription() yields media stream stats
-PASS addTrack(): Media stream stats references track stats
-PASS Media stream stats references track stats
-PASS O/A exchange yields outbound RTP stream stats for sending track
-PASS O/A exchange yields inbound RTP stream stats for receiving track
-PASS replaceTrack() before offer: new track attachment stats present
-PASS replaceTrack() after offer, before answer: new track attachment stats present
-PASS replaceTrack() after answer: new track attachment stats present
-FAIL replaceTrack(): original track attachment stats present after replacing assert_true: Has stats for original track expected true got false
-PASS RTCRtpSender.getStats() contains only outbound-rtp and related stats
-PASS RTCRtpReceiver.getStats() contains only inbound-rtp and related stats
-PASS RTCPeerConnection.getStats(sendingTrack) is the same as RTCRtpSender.getStats()
-PASS RTCPeerConnection.getStats(receivingTrack) is the same as RTCRtpReceiver.getStats()
-PASS RTCPeerConnection.getStats(track) throws InvalidAccessError when there are zero senders or receivers for the track
-PASS RTCPeerConnection.getStats(track) throws InvalidAccessError when there are multiple senders for the track
-Harness: the test ran to completion.
-