Mark fast/loader/submit-form-while-parsing-2.html flaky (timeout).

TBR=rakina@chromium.org

Bug:1046440

No-Try: true
Change-Id: Ibd8c38ab4521f3efb3bda8ac5901a1295de0da6f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2027470Reviewed-by: vitaliii <vitaliii@chromium.org>
Commit-Queue: vitaliii <vitaliii@chromium.org>
Cr-Commit-Position: refs/heads/master@{#736337}

third_party/blink/web_tests/TestExpectations

@@ -6461,7 +6461,7 @@ crbug.com/1046201 [ Mac ] virtual/cascade/fast/forms/calendar-picker/calendar-pi
 crbug.com/1046201 [ Win10 ] virtual/cascade/fast/forms/calendar-picker/calendar-picker-appearance-zoom125.html [ Pass Failure ]
 crbug.com/1042848 virtual/audio-service/external/wpt/mediacapture-streams/idlharness.https.window.html [ Pass Timeout ]
 crbug.com/1042848 virtual/feature-policy-permissions/external/wpt/mediacapture-streams/idlharness.https.window.html [ Pass Timeout ]
-crbug.com/1046440 fast/loader/submit-form-while-parsing-2.html [ Pass Failure ]
+crbug.com/1046440 fast/loader/submit-form-while-parsing-2.html [ Pass Failure Timeout ]
 crbug.com/1041851 [ Mac ] external/wpt/bluetooth/idl/idlharness.tentative.https.window.html [ Pass Timeout ]
 crbug.com/1041851 [ Win10 ] external/wpt/bluetooth/idl/idlharness.tentative.https.window.html [ Pass Timeout ]
 crbug.com/1045346 external/wpt/offscreen-canvas/fill-and-stroke-styles/2d.pattern.basic.nocontext.worker.html [ Crash Pass Timeout ]