Marking failures of layout tests on Webkit Linux Trusty

Bug: 821547
Change-Id: Idd4bd103a12935599a811a3d02b6f0071637543d
Reviewed-on: https://chromium-review.googlesource.com/961443
Commit-Queue: Luna Lu <loonybear@chromium.org>
Reviewed-by: Luna Lu <loonybear@chromium.org>
Cr-Commit-Position: refs/heads/master@{#542892}

third_party/WebKit/LayoutTests/TestExpectations

@@ -1451,7 +1451,8 @@ crbug.com/453002 [ Win ] fast/text/orientation-sideways.html [ Failure Pass ]
 crbug.com/600248 external/wpt/web-animations/interfaces/Animation/oncancel.html [ Pass Failure ]
 crbug.com/771977 external/wpt/web-animations/interfaces/Animation/onfinish.html [ Failure ]
 crbug.com/772048 crbug.com/772060 external/wpt/web-animations/timing-model/animations/updating-the-finished-state.html [ Timeout ]
-crbug.com/816534 external/wpt/web-animations/animation-model/animation-types/interpolation-per-property.html [ Pass Crash ]
+# Test also leaky on WebKit Linux Trusty.
+crbug.com/816534 external/wpt/web-animations/animation-model/animation-types/interpolation-per-property.html [ Pass Crash Failure ]
 crbug.com/816534 external/wpt/web-animations/animation-model/animation-types/addition-per-property.html [ Pass Crash ]
 crbug.com/771722 external/wpt/web-animations/timing-model/animations/the-current-time-of-an-animation.html [ Failure ]
 crbug.com/771722 crbug.com/771751 crbug.com/772060 external/wpt/web-animations/timing-model/animations/setting-the-start-time-of-an-animation.html [ Failure ]
@@ -2591,6 +2592,14 @@ crbug.com/716320 external/wpt/html/infrastructure/safe-passing-of-structured-dat
 crbug.com/716320 external/wpt/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-messagechannel-success.html [ Failure Timeout ]
 crbug.com/716320 external/wpt/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/window-sharedworker-failure.html [ Failure Timeout ]
 
+# Sheriff failures 2018-03-13
+crbug.com/821547 [ Linux ] animations/composition/backdrop-filter-composition.html [ Failure Pass ]
+crbug.com/821547 [ Linux ] animations/interpolation/backdrop-filter-interpolation.html [ Failure Pass ]
+# crbug.com/821547 external/wpt/web-animations/animation-model/animation-types/interpolation-per-property.html [ Failure Pass ]
+crbug.com/821547 [ Linux ] svg/animations/additive-type-by-animation.html [ Failure Pass ]
+crbug.com/821547 [ Linux ] virtual/threaded/animations/composition/backdrop-filter-composition.html [ Failure Pass ]
+crbug.com/821547 [ Linux ] virtual/threaded/animations/interpolation/backdrop-filter-interpolation.html [ Failure Pass ]
+
 # Disabling SharedArrayBuffer
 crbug.com/798864 external/wpt/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/identity-not-preserved.html [ Failure ]
 crbug.com/798864 external/wpt/html/infrastructure/safe-passing-of-structured-data/shared-array-buffers/no-transferring.html [ Failure ]