Mark redirect-cross-origin-post.html as Crash in addition to Timeout

It occasionally crashes instead of timing out on Linux, Windows, and
Mac (all debug).

Flakiness link for convenience:
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=webkit_layout_tests&tests=virtual/outofblink-cors/http/tests/xmlhttprequest/redirect-cross-origin-post.html

TBR=toyoshim@chromium.org

Bug: 736308
Change-Id: If30ac47f075df6766b4e14221db4c9d75f195048
Reviewed-on: https://chromium-review.googlesource.com/1041953Reviewed-by: Marc Treib <treib@chromium.org>
Commit-Queue: Marc Treib <treib@chromium.org>
Cr-Commit-Position: refs/heads/master@{#555699}

third_party/WebKit/LayoutTests/TestExpectations

@@ -1769,6 +1769,7 @@ crbug.com/736308 virtual/outofblink-cors/external/wpt/service-workers/service-wo
 crbug.com/736308 virtual/outofblink-cors/external/wpt/service-workers/service-worker/redirected-response.https.html [ Crash ]
 crbug.com/736308 virtual/outofblink-cors/external/wpt/service-workers/service-worker/referer.https.html [ Crash ]
 crbug.com/736308 virtual/outofblink-cors/external/wpt/service-workers/service-worker/referrer-policy-header.https.html [ Crash ]
+crbug.com/736308 virtual/outofblink-cors/http/tests/xmlhttprequest/redirect-cross-origin-post.html [ Timeout Crash ]
 
 crbug.com/736308 virtual/outofblink-cors/http/tests/xmlhttprequest/upload-onload-event.html [ Crash ]
 crbug.com/736308 virtual/outofblink-cors/http/tests/xmlhttprequest/upload-onloadend-event-after-abort.html [ Crash ]
@@ -1795,7 +1796,6 @@ crbug.com/736308 virtual/outofblink-cors/external/wpt/service-workers/service-wo
 crbug.com/626703 virtual/outofblink-cors/external/wpt/service-workers/service-worker/update-bytecheck.https.html [ Timeout ]
 crbug.com/736308 virtual/outofblink-cors/external/wpt/service-workers/service-worker/worker-in-sandboxed-iframe-by-csp-fetch-event.https.html [ Timeout ]
 crbug.com/736308 virtual/outofblink-cors/http/tests/xmlhttprequest/cross-origin-unsupported-url.html [ Timeout ]
-crbug.com/736308 virtual/outofblink-cors/http/tests/xmlhttprequest/redirect-cross-origin-post.html [ Timeout ]
 crbug.com/736308 virtual/outofblink-cors/http/tests/xmlhttprequest/simple-cross-origin-denied-events-post.html [ Timeout ]
 crbug.com/736308 virtual/outofblink-cors/http/tests/xmlhttprequest/workers/cross-origin-unsupported-url.html [ Timeout ]