[Sheriff] Mark fast/dom/inline-event-attributes-release.html flaky

Test is flaky-failing on win7, with no obvious recent change to be
reverted.

Bug: 891510
Change-Id: Ie77d5cf168bcf363dd994414249ea4f803907690

TBR=mlippautz@chromium.org

Change-Id: Ie77d5cf168bcf363dd994414249ea4f803907690
Reviewed-on: https://chromium-review.googlesource.com/c/1258962
Commit-Queue: Stephen McGruer <smcgruer@chromium.org>
Reviewed-by: Stephen McGruer <smcgruer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#596241}

third_party/WebKit/LayoutTests/TestExpectations

@@ -5240,3 +5240,4 @@ crbug.com/888609 [ Mac ] http/tests/devtools/coverage/gutter-css.js [ Pass Timeo
 
 # Sheriff 2018-10-03
 crbug.com/891530 [ Linux ] virtual/android/rootscroller/remove-rootscroller-crash.html [ Pass Timeout ]
+crbug.com/891510 [ Win7 ] fast/dom/inline-event-attributes-release.html [ Failure Pass ]