www-client/chromium: disable xml catalogs

Bug: https://bugs.gentoo.org/653078
Package-Manager: Portage-2.3.40_p14, Repoman-2.3.9_p246

www-client/chromium/chromium-69.0.3452.0.ebuild

@@ -138,6 +138,7 @@ PATCHES=(
 	"${FILESDIR}/chromium-stdint.patch"
 	"${FILESDIR}/chromium-ffmpeg-r1.patch"
 	"${FILESDIR}/chromium-libwebp-shim-r0.patch"
+	"${FILESDIR}/chromium-disable_xml_catalogs.patch"
 )
 
 pre_build_checks() {

www-client/chromium/files/chromium-disable_xml_catalogs.patch

@@ -0,0 +1,34 @@
+--- a/third_party/blink/renderer/core/xml/parser/xml_document_parser.cc
++++ b/third_party/blink/renderer/core/xml/parser/xml_document_parser.cc
+@@ -28,6 +28,10 @@
+ 
+ #include <libxml/parser.h>
+ #include <libxml/parserInternals.h>
++#include <libxml/xmlversion.h>
++#if defined(LIBXML_CATALOG_ENABLED)
++#include <libxml/catalog.h>
++#endif
+ #include <libxslt/xslt.h>
+ 
+ #include <memory>
+@@ -538,10 +542,6 @@
+ static bool ShouldAllowExternalLoad(const KURL& url) {
+   String url_string = url.GetString();
+ 
+-  // libxml should not be configured with catalogs enabled, so it
+-  // should not be asking to load default catalogs.
+-  CHECK(!IsLibxmlDefaultCatalogFile(url));
+-
+   // The most common DTD. There isn't much point in hammering www.w3c.org by
+   // requesting this URL for every XHTML document.
+   if (url_string.StartsWithIgnoringASCIICase("http://www.w3.org/TR/xhtml"))
+@@ -648,6 +648,9 @@
+   if (did_init)
+     return;
+ 
++#if defined(LIBXML_CATALOG_ENABLED)
++  xmlCatalogSetDefaults(XML_CATA_ALLOW_NONE);
++#endif
+   xmlInitParser();
+   xmlRegisterInputCallbacks(MatchFunc, OpenFunc, ReadFunc, CloseFunc);
+   xmlRegisterOutputCallbacks(MatchFunc, OpenFunc, WriteFunc, CloseFunc);