import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

layout/reftests/svg/dynamic-textPath-02.svg

@@ -0,0 +1,26 @@
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait">
+  <title>Test for changes to the IDs in the document causing textPath references to update</title>
+
+  <defs>
+    <path id="p1" d="M 100,100 h 200"/>
+    <path id="p1" d="M 100,200 h 200"/>
+  </defs>
+
+  <text style="16px sans-serif"><textPath xlink:href="#p1">Hello</textPath></text>
+
+  <script>
+    document.addEventListener("MozReftestInvalidate", doTest, false);
+    setTimeout(doTest, 4000); // fallback for running outside reftest
+
+    function doTest() {
+      document.getElementsByTagName("path")[0].removeAttribute("id");
+      document.documentElement.removeAttribute("class");
+    }
+  </script>
+</svg>