Upstream css-display-3/display-contents-set-get.html to WPT

Change-Id: I071484497d2126171928191c66985e2e055e3f8b
Reviewed-on: https://chromium-review.googlesource.com/945147Reviewed-by: Manuel Rego Casasnovas <rego@igalia.com>
Commit-Queue: Manuel Rego Casasnovas <rego@igalia.com>
Cr-Commit-Position: refs/heads/master@{#540984}

third_party/WebKit/LayoutTests/css-display-3/display-contents-set-get.html → third_party/WebKit/LayoutTests/external/wpt/css/css-display/display-contents-parsing-001.html

@@ -3,8 +3,8 @@
 <title>Tests that the 'contents' value for the 'display' property is correctly parsed</title>
 <link rel="help" href="https://drafts.csswg.org/css-display/#box-generation">
 <link rel="author" href="mailto:ecobos@igalia.com" title="Emilio Cobos Álvarez">
-<script src="../resources/testharness.js"></script>
-<script src="../resources/testharnessreport.js"></script>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
 <style>
   .contents {
     display: contents;