Remove obsolete files from 'sources'. This causes needless work on incrementa...

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': [
       # Define an "os_include" variable that points at the OS-specific generated
       # headers.  These were generated by running the configure script offline.
       ['OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris"', {
@@ skipping 76 matching lines @@
             'src/include/libxml/xmlschemas.h',
             'src/include/libxml/xmlschemastypes.h',
             'src/include/libxml/xmlstring.h',
             'src/include/libxml/xmlunicode.h',
             'src/include/libxml/xmlwriter.h',
             'src/include/libxml/xpath.h',
             'src/include/libxml/xpathInternals.h',
             'src/include/libxml/xpointer.h',
             'src/include/win32config.h',
             'src/include/wsockcompat.h',
-            'src/win32/config.h',
-            'src/win32/include/libxml/xmlversion.h',
             'src/acconfig.h',
             'src/c14n.c',
             'src/catalog.c',
             'src/chvalid.c',
             'src/debugXML.c',
             'src/dict.c',
             'src/DOCBparser.c',
             'src/elfgcchack.h',
             'src/encoding.c',
             'src/entities.c',
@@ skipping 34 matching lines @@
             'src/xmlreader.c',
             'src/xmlregexp.c',
             'src/xmlsave.c',
             'src/xmlschemas.c',
             'src/xmlschemastypes.c',
             'src/xmlstring.c',
             'src/xmlunicode.c',
             'src/xmlwriter.c',
             'src/xpath.c',
             'src/xpointer.c',
+            'win32/config.h',
+            'win32/include/libxml/xmlversion.h',
           ],
           'defines': [
             # Define LIBXML_STATIC as nothing to match how libxml.h
             # (an internal header) defines LIBXML_STATIC, otherwise
             # we get the macro redefined warning from GCC.  (-DFOO
             # defines the macro FOO as 1.)
             'LIBXML_STATIC=',
           ],
           'include_dirs': [
             '<(os_include)',
@@ skipping 36 matching lines @@
       ],
     },
   ],
 }
 
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