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+<!DOCTYPE html>
+<html class="reftest-wait">
+<title>Test transition from single-alpha layer to component-alpha layer from a display port size change</title>
+<script type="text/javascript">
+ document.addEventListener('MozReftestInvalidate', function() {
+ var scrollbox = document.getElementById('scrollbox');
+ scrollbox.scrollTop = 1000;
+ document.documentElement.className = '';
+ });
+</script>
+<style>
+#scrollbox {
+ margin: 20px;
+ width: 300px;
+ height: 400px;
+ overflow-y: scroll;
+ background: linear-gradient(#FFF, #FFF);
+}
+
+#inner {
+ background-color: #000;
+ margin-top: 10px;
+ height: 5px;
+ line-height: 5px;
+ padding-bottom: 400px;
+}
+</style>
+
+<div id="scrollbox">
+ <div id="inner">
+ Text
+ </div>
+</div>