Remove the build time generation of config.h and xmlversion.h.

third_party/libxml/libxml.scons

 # Copyright 2008, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #    * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #    * Redistributions in binary form must reproduce the above
@@ skipping 109 matching lines @@
                     '$LIBXML_DIR/build/libxml_config.vcproj',
                 ],
                 guid='{F9810DE8-CBC3-4605-A7B1-ECA2D5292FD7}')
 
 env.ChromeMSVSProject('$LIBXML_DIR/build/libxml_config.vcproj',
                 guid='{31D88CBF-DC28-47A8-8838-BF81D528EE74}')
 
 
 if env.Bit('windows'):
   config_files = [
-      # The configure.js script must be first in this list; the
-      # env.Command() call below executes the first list element.
-
-      'win32/configure.js',
-      'win32/Makefile.msvc',
-
-      'config.h.in',
-      'configure.in',
-      'libxml-2.0-uninstalled.pc.in',
-      'libxml-2.0.pc.in',
-      'libxml.spec.in',
-      'xml2-config.in',
-      'xml2Conf.sh.in',
-
-      'include/libxml/xmlversion.h.in',
-      'include/win32config.h',
+      'config.h',
+      'include/libxml/xmlversion.h',
   ]
-
-  copied_files = []
   for cf in config_files:
-    result = env.Command('DerivedSources/' + cf, cf, Copy('$TARGET', '$SOURCE'))
-    copied_files.extend(result)
-
-  env.Command(['DerivedSources/config.h',
-               'DerivedSources/include/libxml/xmlversion.h'],
-              copied_files,
-              'cd ${SOURCE.dir} && $CSCRIPT ${SOURCE.file} $CONFIG_OPTIONS',
-              CONFIG_OPTIONS='compiler=msvc iconv=no icu=yes')
+    result = env.Command('DerivedSources/' + cf, 'win32/' + cf,
+                         Copy('$TARGET', '$SOURCE'))
 elif env.Bit('linux'):
   config_files = [
       'config.h',
       'include/libxml/xmlversion.h',
       'xml2-config',
   ]
   for cf in config_files:
     result = env.Command('DerivedSources/' + cf, 'linux/' + cf,
                          Copy('$TARGET', '$SOURCE'))