Check in the libxml roll script.

third_party/libxml/chromium/chromium-issue-599427.patch

Index: third_party/libxml/chromium/chromium-issue-599427.patch
diff --git a/third_party/libxml/chromium/chromium-issue-599427.patch b/third_party/libxml/chromium/chromium-issue-599427.patch
new file mode 100644
index 0000000000000000000000000000000000000000..20e26c51942aa386b45d737d3b1cb7e4d69fc868
--- /dev/null
+++ b/third_party/libxml/chromium/chromium-issue-599427.patch
@@ -0,0 +1,28 @@
+--- a/xmlstring.c	2016-05-13 17:24:58.870079372 +0900
++++ b/xmlstring.c	2016-04-25 13:58:09.879238595 +0900
+@@ -835,16 +835,20 @@
+     while ( len-- > 0) {
+         if ( !*ptr )
+             break;
+-        if ( (ch = *ptr++) & 0x80)
+-            while ((ch<<=1) & 0x80 ) {
+-		if (*ptr == 0) break;
++        if ( (ch = *ptr++) & 0x80) {
++            // Workaround for an optimization bug in VS 2015 Update 2, remove
++            // once the fix is released. crbug.com/599427
++            // https://connect.microsoft.com/VisualStudio/feedback/details/2582138
++            xmlChar ch2 = ch;
++            while ((ch2<<=1) & 0x80 ) {
+                 ptr++;
+-	    }
++                if (*ptr == 0) break;
++            }
++        }
+     }
+     return (ptr - utf);
+ }
+ 
+-
+ /**
+  * xmlUTF8Strndup:
+  * @utf:  the input UTF8 *