Implement the file chooser as a new resource "host"

ppapi/ppapi_proxy.gypi

 # Copyright (c) 2012 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': {
       'ppapi_proxy_target': 0,
     },
     'target_conditions': [
       # This part is shared between the targets defined below.
       ['ppapi_proxy_target==1', {
         'sources': [
           # Take some standalone files from the C++ wrapper allowing us to more
           # easily make async callbacks in the proxy. We can't depend on the
           # full C++ wrappers at this layer since the C++ wrappers expect
           # symbols defining the globals for "being a plugin" which we are not.
           # These callback files are standalone.
           'cpp/completion_callback.h',
           'utility/completion_callback_factory.h',
 
           'proxy/broker_dispatcher.cc',
           'proxy/broker_dispatcher.h',
           'proxy/dispatcher.cc',
           'proxy/dispatcher.h',
           'proxy/enter_proxy.h',
+          'proxy/file_chooser_resource.cc',
+          'proxy/file_chooser_resource.h',
           'proxy/host_dispatcher.cc',
           'proxy/host_dispatcher.h',
           'proxy/host_var_serialization_rules.cc',
           'proxy/host_var_serialization_rules.h',
           'proxy/interface_list.cc',
           'proxy/interface_list.h',
           'proxy/interface_proxy.cc',
           'proxy/interface_proxy.h',
           'proxy/pepper_file_messages.cc',
           'proxy/pepper_file_messages.h',
           'proxy/plugin_array_buffer_var.cc',
           'proxy/plugin_array_buffer_var.h',
           'proxy/plugin_dispatcher.cc',
           'proxy/plugin_dispatcher.h',
           'proxy/plugin_globals.cc',
           'proxy/plugin_globals.h',
           'proxy/plugin_main_nacl.cc',
           'proxy/plugin_message_filter.cc',
           'proxy/plugin_message_filter.h',
+          'proxy/plugin_resource.cc',
+          'proxy/plugin_resource.h',
           'proxy/plugin_resource_tracker.cc',
           'proxy/plugin_resource_tracker.h',
           'proxy/plugin_var_serialization_rules.cc',
           'proxy/plugin_var_serialization_rules.h',
           'proxy/plugin_var_tracker.cc',
           'proxy/plugin_var_tracker.h',
           'proxy/ppapi_messages.cc',
           'proxy/ppapi_messages.h',
           'proxy/ppapi_command_buffer_proxy.h',
           'proxy/ppapi_command_buffer_proxy.cc',
           'proxy/ppapi_param_traits.cc',
           'proxy/ppapi_param_traits.h',
           'proxy/ppb_audio_input_proxy.cc',
           'proxy/ppb_audio_input_proxy.h',
           'proxy/ppb_audio_proxy.cc',
           'proxy/ppb_audio_proxy.h',
           '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_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_device_id_proxy.cc',
           'proxy/ppb_flash_device_id_proxy.h',
           'proxy/ppb_flash_proxy.cc',
           'proxy/ppb_flash_proxy.h',
@@ skipping 115 matching lines @@
               'proxy/ppp_instance_private_proxy.cc',
               'proxy/ppp_video_decoder_proxy.cc',
               'proxy/serialized_flash_menu.cc',
             ],
           }],
         ],
       }],
     ],
   },
 }