Disable tests for devtools feature

Feature CL: http://crrev.com/c/2443620
Enable CL: http://crrev.com/c/2454085

Bug: 1127827
Change-Id: Ic7ad3ce77c222163794dd3173d046fa3fe6a8a5f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2454721
Commit-Queue: Alex Rudenko <alexrudenko@chromium.org>
Auto-Submit: Peter Marshall <petermarshall@chromium.org>
Reviewed-by: Alex Rudenko <alexrudenko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#816477}

third_party/blink/web_tests/TestExpectations

@@ -2067,6 +2067,10 @@ crbug.com/932343 external/wpt/css/css-pseudo/selection-text-shadow-016.html [ Fa
 
 crbug.com/723741 virtual/threaded/http/tests/devtools/tracing/idle-callback.js [ Failure Crash Pass Timeout ]
 
+# Temporarily disabled to land a devtools-frontend change.
+crbug.com/1127827 http/tests/devtools/tracing/timeline-js/timeline-js-callstacks.js [ Pass Failure ]
+crbug.com/1127827 http/tests/devtools/tracing/timeline-misc/timeline-aggregated-details.js [ Pass Failure ]
+
 # Untriaged failures after https://crrev.com/c/543695/.
 # These need to be updated but appear not to be related to that change.
 crbug.com/626703 http/tests/devtools/indexeddb/database-refresh-view.js [ Pass Failure ]