Add a mochitest for bug 379025, r=sayrer

parser/htmlparser/tests/mochitest/Makefile.in

@@ -53,6 +53,7 @@ _TEST_FILES =	parser_datreader.js \
 		test_html5_tree_construction.html \
 	 	test_bug339350.xhtml \
 		test_bug358797.html \
+		test_bug379025.txt \
 		$(NULL)
 
 libs:: $(_TEST_FILES)

parser/htmlparser/tests/mochitest/test_html5_tree_construction.html

@@ -17,7 +17,8 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=366936
   <script class="testbody" type="application/javascript;version=1.7">
    var parserDatFiles = ["html5lib_tree_dat1.txt", 
                          "html5lib_tree_dat2.txt",
-                         "html5lib_tree_dat3.txt"];
+                         "html5lib_tree_dat3.txt",
+                         "test_bug379025.txt"];
   </script>
   <script type="application/javascript;version=1.7"
           src="parser_web_testrunner.js"></script>