Adding fixed guids to some modules to facilitate incremental switch to gyp.

third_party/libxml/libxml.gyp

 # Copyright (c) 2009 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': [
       ['OS=="linux"', {'os_include': 'linux'}],
       ['OS=="mac"', {'os_include': 'mac'}],
       ['OS=="win"', {'os_include': 'win32'}],
     ],
   },
   'includes': [
     '../../build/common.gypi',
   ],
   'targets': [
     {
       'target_name': 'libxml',
       'type': 'static_library',
+      'msvs_guid': 'F9810DE8-CBC3-4605-A7B1-ECA2D5292FD7',
       'sources': [
         'include/libxml/c14n.h',
         'include/libxml/catalog.h',
         'include/libxml/chvalid.h',
         'include/libxml/debugXML.h',
         'include/libxml/dict.h',
         'include/libxml/DOCBparser.h',
         'include/libxml/encoding.h',
         'include/libxml/entities.h',
         'include/libxml/globals.h',
@@ skipping 151 matching lines @@
       ],
       'include_dirs': [
         '<(os_include)',
       ],
       'dependencies': [
         'libxml',
       ],
     },
   ],
 }