[DevTools] Temporarily disable tests to allow landing DevTools changes

Frontend CL: https://crrev.com/c/2581542
Re-enable tests CL: https://crrev.com/c/2581839

Bug: 1152082
Design doc: http://doc/1UnwKLgjYPDsLsYCBh9LKiaPN6Aq2XLKvt4Ak3FT7J3k

Change-Id: I488a7ef1c88d9ff56080918f0154c22b76ea529b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2580885Reviewed-by: Peter Marshall <petermarshall@chromium.org>
Commit-Queue: Wolfgang Beyer <wolfi@chromium.org>
Cr-Commit-Position: refs/heads/master@{#835622}

third_party/blink/web_tests/TestExpectations

@@ -5749,6 +5749,10 @@ crbug.com/1042877 http/tests/security/mixedContent/strict-mode-via-pref-image-bl
 # Mixed content autoupgrades cause test to fail because test relied on http subresources to test a different origin, needs to be changed to not rely on HTTP URLs.
 crbug.com/1042877 http/tests/security/img-crossorigin-redirect-credentials.https.html [ Failure ]
 
+# Temporarily disable tests to land DevTools frontend changes
+crbug.com/1152082 http/tests/devtools/a11y-axe-core/sources/call-stack-a11y-test.js [ Pass Failure Timeout ]
+crbug.com/1152082 http/tests/devtools/tracing/timeline-js/timeline-js-blackboxing.js [ Pass Failure Timeout ]
+
 # Sheriff 2020-10-09
 crbug.com/1136687 external/wpt/pointerevents/pointerlock/pointerevent_pointerlock_supercedes_capture.html [ Pass Failure ]
 crbug.com/1136726 [ Linux ] virtual/gpu-rasterization/images/imagemap-focus-ring-outline-color-not-inherited-from-map.html [ Failure ]