Mark some idlharness.html tests as timeout=long

These are symptomatic of crbug.com/1047818, but to stop the pain for
sheriffs lets mark them timeout=long for now.

TBR=robertma@chromium.org

Bug: 1092140, 1092234, 1092229, 1092143
Change-Id: Iec381fff06f8bf389c36ada9753b40b3e6048200
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2235459Reviewed-by: Stephen McGruer <smcgruer@chromium.org>
Commit-Queue: Stephen McGruer <smcgruer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#776013}

third_party/blink/web_tests/external/wpt/permissions-request/idlharness.any.js

 // META: script=/resources/WebIDLParser.js
 // META: script=/resources/idlharness.js
+// META: timeout=long
 
 'use strict';