import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

testing/web-platform/tests/resources/webidl2/test/widlproc/doc/htmltodtd.xsl

@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="us-ascii"?>
+<!--====================================================================
+$Id$
+Copyright 2009 Aplix Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+
+Stylesheet to extract DTD for widlprocxml from widlproc.html
+=====================================================================-->
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
+<xsl:output method="text" encoding="us-ascii" indent="no"/>
+
+<!-- <pre class="dtd"> element -->
+<xsl:template match="pre[@class='dtd']">
+    <xsl:value-of select="."/>
+</xsl:template>
+
+<!--Ignore other text. -->
+<xsl:template match="text()" priority="-100"/>
+
+</xsl:stylesheet>