Implement a proxy for Pepper FileIO.

ppapi/ppapi_proxy.gypi

 # Copyright (c) 2011 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.
 
 {
   'targets': [
     {
       'target_name': 'ppapi_proxy',
       'type': '<(component)',
       'dependencies': [
@@ skipping 52 matching lines @@
         'proxy/ppb_broker_proxy.cc',
         'proxy/ppb_broker_proxy.h',
         'proxy/ppb_buffer_proxy.cc',
         'proxy/ppb_buffer_proxy.h',
         'proxy/ppb_core_proxy.cc',
         'proxy/ppb_core_proxy.h',
         'proxy/ppb_cursor_control_proxy.cc',
         'proxy/ppb_cursor_control_proxy.h',
         'proxy/ppb_file_chooser_proxy.cc',
         'proxy/ppb_file_chooser_proxy.h',
+        'proxy/ppb_file_io_proxy.cc',
+        'proxy/ppb_file_io_proxy.h',
         'proxy/ppb_file_ref_proxy.cc',
         'proxy/ppb_file_ref_proxy.h',
         'proxy/ppb_file_system_proxy.cc',
         'proxy/ppb_file_system_proxy.h',
         'proxy/ppb_flash_clipboard_proxy.cc',
         'proxy/ppb_flash_clipboard_proxy.h',
         'proxy/ppb_flash_file_proxy.cc',
         'proxy/ppb_flash_file_proxy.h',
         'proxy/ppb_flash_proxy.cc',
         'proxy/ppb_flash_proxy.h',
@@ skipping 62 matching lines @@
         'proxy/serialized_var.cc',
         'proxy/serialized_var.h',
         'proxy/var_serialization_rules.h',
       ],
       'defines': [
         'PPAPI_PROXY_IMPLEMENTATION',
       ],
     },
   ],
 }