import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

layout/reftests/pixel-rounding/image-high-quality-scaling-1.html

@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<!-- Any copyright is dedicated to the Public Domain.
+   - http://creativecommons.org/publicdomain/zero/1.0/ -->
+<html class="reftest-wait">
+<head>
+  <script>
+    // We add an artificial delay before the reftest snapshot to increase the
+    // chance that we're snapshotting the high-quality downscaled version of
+    // the image. This is necessary because high-quality downscaling is
+    // currently an async process. Bug 1045926 will eliminate the need for this
+    // delay.
+    function snapshot() {
+      document.documentElement.removeAttribute('class');
+    }
+  </script>
+</head>
+<body onload="setTimeout(snapshot, 250)">
+<div style="padding: 1em 3em; font-size: 80%; width: 300px; text-align: center;">
+  <img src="green-circle-with-blue-border.png" height="220">
+</div>
+</body>
+</html>