Actually mark flaky devtools test as flaky.

These tests were timing out rather than (or in addition to?) failing, so
add Timeout as one of the expected outcomes.

Bug: 1149734
Change-Id: Ief7709340fe76350a210046d7cd75a0626d9c44d
Tbr: tguilbert@chromium.org
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2545249Reviewed-by: Marijn Kruisselbrink <mek@chromium.org>
Reviewed-by: Thomas Guilbert <tguilbert@chromium.org>
Commit-Queue: Marijn Kruisselbrink <mek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828421}

third_party/blink/web_tests/TestExpectations

@@ -6000,7 +6000,7 @@ crbug.com/1130020 virtual/threaded-prefer-compositing/fast/scrolling/scrollbars/
 crbug.com/1011811 http/tests/devtools/console/console-edit-expanded-tree.js [ Skip ]
 
 # Sheriff 2020-11-16
-crbug.com/1149734 http/tests/devtools/sources/debugger-ui/debugger-inline-values-frames.js [ Pass Failure ]
-crbug.com/1149734 http/tests/devtools/sources/debugger-ui/reveal-execution-line.js [ Pass Failure ]
+crbug.com/1149734 http/tests/devtools/sources/debugger-ui/debugger-inline-values-frames.js [ Pass Failure Timeout ]
+crbug.com/1149734 http/tests/devtools/sources/debugger-ui/reveal-execution-line.js [ Pass Failure Timeout ]
 crbug.com/1149987 external/wpt/websockets/Create-blocked-port.any.html [ Pass Timeout ]
 crbug.com/1149987 external/wpt/websockets/Create-blocked-port.any.worker.html [ Pass Timeout ]