The library was previously in gwt-dev.jar and was included
automatically, moved to gwt-user.jar in GWT 2.5 release branch and thus
needs to be included explicitly.
<zipfileset src="${gwt.tools.lib}/w3c/sac/sac-1.3.jar" />
<zipfileset src="${gwt.tools.lib}/w3c/flute/flute-1.3-gg2.jar" />
+ <zipfileset src="${gwt.tools.lib}/streamhtmlparser/streamhtmlparser-jsilver-r10/streamhtmlparser-jsilver-r10-1.5-rebased.jar" />
<!-- GWT development JAR contents including many external dependencies -->
<zipfileset src="${gwt.dev.jar}" excludes="javax/servlet/**,javax/xml/**" />