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

third_party/libxml/chromium/roll.py

 #!/usr/bin/env python
 
 # Copyright 2017 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import argparse
 import os
 import os.path
 import shutil
@@ skipping 57 matching lines @@
 #    d. third_party/libxml/chromium/roll.py --mac
 #    e. Make and commit any final changes to README.chromium, BUILD.gn, etc.
 #    f. Complete the code review process as usual: git cl upload -d;
 #       git cl try-results; etc.
 
 PATCHES = [
     'chromium-issue-599427.patch',
     'chromium-issue-620679.patch',
     'chromium-issue-628581.patch',
     'chromium-issue-683629.patch',
+    'libxml2-2.9.4-security-CVE-2017-7375-xmlParsePEReference-xxe.patch',
+    'libxml2-2.9.4-security-CVE-2017-7376-nanohttp-out-of-bounds-write.patch',
+    'libxml2-2.9.4-security-xpath-nodetab-uaf.patch',
+    'libxml2-2.9.4-xmlDumpElementContent-null-deref.patch',
 ]
 
 
 # See libxml2 configure.ac and win32/configure.js to learn what
 # options are available.
 
 # These two sets of options should be in sync. You can check the
 # generated #defines in (win32|mac|linux)/include/libxml.h to confirm
 # this.
 SHARED_XML_CONFIGURE_OPTIONS = [
@@ skipping 338 matching lines @@
         libxml2_repo_path = os.path.abspath(libxml2_repo_path)
         roll_libxml_linux(src_dir, libxml2_repo_path)
     elif args.win32:
         roll_libxml_win32(src_dir)
     elif args.mac:
         roll_libxml_mac(src_dir)
 
 
 if __name__ == '__main__':
     main()