Experimentally isolate GetOpenFileName in a utility process.

chrome/chrome_utility.gypi

 # Copyright 2014 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': {
     'chrome_utility_sources': [
       'utility/chrome_content_utility_client.cc',
       'utility/chrome_content_utility_client.h',
       'utility/chrome_content_utility_ipc_whitelist.cc',
       'utility/chrome_content_utility_ipc_whitelist.h',
       'utility/cloud_print/bitmap_image.cc',
       'utility/cloud_print/bitmap_image.h',
       'utility/cloud_print/pwg_encoder.cc',
       'utility/cloud_print/pwg_encoder.h',
       'utility/local_discovery/service_discovery_message_handler.cc',
       'utility/local_discovery/service_discovery_message_handler.h',
       'utility/printing_handler.cc',
       'utility/printing_handler.h',
+      'utility/shell_handler_win.cc',
+      'utility/shell_handler_win.h',
       'utility/utility_message_handler.h',
       'utility/web_resource_unpacker.cc',
       'utility/web_resource_unpacker.h',
     ],
     'chrome_utility_extensions_sources': [
       'utility/extensions/extensions_handler.cc',
       'utility/extensions/extensions_handler.h',
       'utility/extensions/unpacker.cc',
       'utility/extensions/unpacker.h',
       'utility/image_writer/disk_unmounter_mac.cc',
@@ skipping 154 matching lines @@
         }],
         ['safe_browsing==1', {
           'defines': [ 'FULL_SAFE_BROWSING' ],
         }],
       ],
       # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },
   ],
 }