Improve XML serialization, URI parsing, and XPath node set processing.

third_party/libxml/chromium/libxml2-2.9.4-security-CVE-2017-7376-nanohttp-out-of-bounds-write.patch

Index: third_party/libxml/chromium/libxml2-2.9.4-security-CVE-2017-7376-nanohttp-out-of-bounds-write.patch
diff --git a/third_party/libxml/chromium/libxml2-2.9.4-security-CVE-2017-7376-nanohttp-out-of-bounds-write.patch b/third_party/libxml/chromium/libxml2-2.9.4-security-CVE-2017-7376-nanohttp-out-of-bounds-write.patch
new file mode 100644
index 0000000000000000000000000000000000000000..e60fe8fa9ee17afbdf04c5c6b1f8afedf6cd2132
--- /dev/null
+++ b/third_party/libxml/chromium/libxml2-2.9.4-security-CVE-2017-7376-nanohttp-out-of-bounds-write.patch
@@ -0,0 +1,21 @@
+https://bugzilla.gnome.org/show_bug.cgi?id=780690
+
+--- src/uri.c
++++ src/uri.c
+@@ -12,6 +12,7 @@
+ #include "third_party/libxml/src/libxml.h"
+ 
+ #include <string.h>
++#include <limits.h>
+ 
+ #include "third_party/libxml/src/include/libxml/xmlmemory.h"
+ #include "third_party/libxml/src/include/libxml/uri.h"
+@@ -334,7 +335,7 @@ xmlParse3986Port(xmlURIPtr uri, const char **str)
+ 	    cur++;
+ 	}
+ 	if (uri != NULL)
+-	    uri->port = port & INT_MAX; /* port value modulo INT_MAX+1 */
++	    uri->port = port & USHRT_MAX; /* port value modulo USHRT_MAX+1 */
+ 	*str = cur;
+ 	return(0);
+     }