Split win_util.cc - we need the code in ConvertToLongPath in the 64-bit Windows build

app/app_base.gypi

 # 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.
 
 {
   'target_defaults': {
     'variables': {
       'app_base_target': 0,
     },
     'target_conditions': [
@@ skipping 22 matching lines @@
         ],
         'include_dirs': [
           '..',
           '../chrome/third_party/wtl/include',
         ],
         'conditions': [
           ['OS=="win"', {
             'sources': [
               'win_util.cc',
               'win_util.h',
+              'win_util_path.cc',
             ],
           }],
           ['OS!="linux"', {
             'sources!': [
               'gfx/gtk_util.cc',
               'gfx/gtk_util.h',
               'gtk_dnd_util.cc',
               'gtk_dnd_util.h',
             ],
           }],
@@ skipping 232 matching lines @@
           'configurations': {
             'Common_Base': {
               'msvs_target_platform': 'x64',
             },
           },
         },
       ],
     }],
   ],
 }