Flaky test http/tests/appcache/non-html.xhtml

Test has become a persistent flake in Release mode Linux & Win. Update
test expectations,  [ Crash Pass Failure Timeout ]

Tbr: jsbell@
No-try: true
Bug: 835943
Change-Id: Ic3e3bcaff34c4bbcff6b8ec7cf17390dadb7584d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1538275Reviewed-by: Noel Gordon <noel@chromium.org>
Commit-Queue: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#644757}

third_party/blink/web_tests/TestExpectations

@@ -6162,3 +6162,6 @@ crbug.com/919789 virtual/video-surface-layer/media/controls/overflow-menu-hide-o
 crbug.com/919789 paint/invalidation/resize-iframe-text.html [ Pass Timeout ]
 crbug.com/919789 paint/invalidation/scroll/scrollbar-damage-and-full-viewport-repaint.html [ Pass Timeout ]
 crbug.com/919789 paint/invalidation/window-resize/ [ Pass Timeout ]
+
+# Sheriff 2019-03-27
+crbug.com/835943 [ Release ] http/tests/appcache/non-html.xhtml [ Crash Pass Failure Timeout ]