Move file_util to be POSIX-only

base/base.gyp

 # Copyright 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.
 
 {
   'includes': [
     '../build/common.gypi',
   ],
 
   'targets': [
@@ skipping 13 matching lines @@
               '$(SDKROOT)/System/Library/Frameworks/IOKit.framework',
               '$(SDKROOT)/System/Library/Frameworks/Security.framework',
             ],
           }],
         ],
       },
       'sources': [
         'auto_reset.h',
         'basictypes.h',
         'compiler_specific.h',
-        'file_util.cc',
         'file_util.h',
+        'file_util_posix.cc',
         'files/file_path.cc',
         'files/file_path.h',
         'files/scoped_file.cc',
         'files/scoped_file.h',
         'logging.cc',
         'logging.h',
         'mac/close_nocancel.cc',
         'mac/foundation_util.h',
         'mac/foundation_util.mm',
         'mac/mach_logging.h',
@@ skipping 52 matching lines @@
         '../build/build_config.h',
       ],
       'direct_dependent_settings': {
         'include_dirs': [
           '..',
         ],
       },
     },
   ],
 }