import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

layout/reftests/svg/smil/syncbase/new-interval-early-end-1.svg

@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="setTimeAndSnapshot(2, true)">
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <!--
+    Test an early end with a negative offset.
+    (An early end is when a new interval restarts the current animation
+    mid-way.)
+   -->
+  <rect width="100" height="100" fill="red">
+    <animate attributeName="y" attributeType="XML" from="0" to="0" id="a"
+      begin="0s; 2s" dur="4s"/>
+    <animate attributeName="fill" attributeType="CSS"
+      values="orange; green; purple"
+      begin="a.begin-0.5s" dur="1s" restart="whenNotActive"/>
+  </rect>
+</svg>