Move libxml_utils from chrome/common to third_party/libxml/chromium.

third_party/libxml/libxml.gyp

 # Copyright (c) 2012 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.
 
 {
   'variables': {
     'conditions': [
       # Define an "os_include" variable that points at the OS-specific generated
       # headers.  These were generated by running the configure script offline.
       ['os_posix == 1 and OS != "mac"', {
         'os_include': 'linux'
       }],
       ['OS=="mac"', {'os_include': 'mac'}],
       ['OS=="win"', {'os_include': 'win32'}],
     ],
     'use_system_libxml%': 0,
   },
   'targets': [
     {
       'target_name': 'libxml',
       'conditions': [
         ['os_posix == 1 and OS != "mac" and use_system_libxml', {
-          'type': 'none',
+          'type': 'static_library',
+          'sources': [
+            'chromium/libxml_utils.h',
+            'chromium/libxml_utils.cc',
+          ],
+          'cflags': [
+            '<!@(pkg-config --cflags libxml-2.0)',
+          ],
+          'defines': [
+            'USE_SYSTEM_LIBXML',
+          ],
           'direct_dependent_settings': {
             'cflags': [
               '<!@(pkg-config --cflags libxml-2.0)',
             ],
             'defines': [
               'USE_SYSTEM_LIBXML',
             ],
           },
           'link_settings': {
             'ldflags': [
               '<!@(pkg-config --libs-only-L --libs-only-other libxml-2.0)',
             ],
             'libraries': [
               '<!@(pkg-config --libs-only-l libxml-2.0)',
             ],
           },
         }, { # else: os_posix != 1 or OS == "mac" or ! use_system_libxml
           'type': 'static_library',
           'sources': [
+            'chromium/libxml_utils.h',
+            'chromium/libxml_utils.cc',
             'linux/config.h',
             'linux/include/libxml/xmlversion.h',
             'mac/config.h',
             'mac/include/libxml/xmlversion.h',
             'src/include/libxml/c14n.h',
             'src/include/libxml/catalog.h',
             'src/include/libxml/chvalid.h',
             'src/include/libxml/debugXML.h',
             'src/include/libxml/dict.h',
             'src/include/libxml/DOCBparser.h',
@@ skipping 159 matching lines @@
                 '-Wno-pointer-sign',
                 '-Wno-empty-body',
               ],
             }],
           ],
         }],
       ],
     },
   ],
 }