import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

layout/reftests/svg/text/mask-content-2.svg

@@ -0,0 +1,44 @@
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<svg xmlns="http://www.w3.org/2000/svg" class="reftest-wait">
+  <style>
+    @font-face {
+      font-family: Ahem;
+      src: url(../../fonts/Ahem.ttf);
+    }
+  </style>
+  <defs>
+    <mask id="m" x="0" y="0" width="600" height="400">
+      <g style="font: 32px Ahem; white-space: pre; fill: white">
+        <text x="20" y="100">one</text>
+        <text x="20" y="150" style="text-decoration: line-through">   </text>
+      </g>
+    </mask>
+  </defs>
+  <rect x="0" y="0" width="600" height="400" fill="blue" mask="url(#m)"/>
+  <g fill="none" stroke="black" stroke-width="4" shape-rendering="crispEdges">
+    <rect x="20" y="73" width="96" height="32"/>
+  </g>
+  <script>
+    function waitUntilFontLoaded() {
+      var canvas = document.createElementNS("http://www.w3.org/1999/xhtml", "canvas");
+      canvas.width = 100;
+      canvas.height = 100;
+      var ctx = canvas.getContext("2d");
+      ctx.font = "100px Ahem";
+      ctx.fillText("_", 0, 100);
+      var img = ctx.getImageData(50, 50, 1, 1);
+      if (img.data[3] == 255) {
+        setTimeout(function() {
+          document.documentElement.removeAttribute("class");
+        }, 1);
+      } else {
+        setTimeout(waitUntilFontLoaded, 200);
+      }
+    }
+
+    setTimeout(waitUntilFontLoaded, 200);
+  </script>
+</svg>