Revert 31875 to see whether it fixes reliability bot.

ipc/ipc.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.
 
 {
   'target_defaults': {
     'sources/': [
       ['exclude', '/win/'],
       ['exclude', '_(posix|win)(_unittest)?\\.(cc|mm?)$'],
       ['exclude', '/win_[^/]*\\.cc$'],
@@ skipping 34 matching lines @@
         'ipc_channel_win.cc',
         'ipc_channel_win.h',
         'ipc_descriptors.h',
         'ipc_logging.cc',
         'ipc_logging.h',
         'ipc_message.cc',
         'ipc_message.h',
         'ipc_message_macros.h',
         'ipc_message_utils.cc',
         'ipc_message_utils.h',
-        'ipc_platform_file.h',
         'ipc_switches.cc',
         'ipc_switches.h',
         'ipc_sync_channel.cc',
         'ipc_sync_channel.h',
         'ipc_sync_message.cc',
         'ipc_sync_message.h',
      ],
      'direct_dependent_settings': {
         'include_dirs': [
           '..',
@@ skipping 38 matching lines @@
       ],
     },
   ]
 }
 
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