HostResolver is exposed to Native Client.

ppapi/ppapi_sources.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.
 
 {
   'variables': {
     'c_source_files': [
       'c/pp_array_output.h',
       'c/pp_bool.h',
       'c/pp_completion_callback.h',
@@ skipping 287 matching lines @@
     #
     'test_common_source_files': [
       # Common test files
       'tests/all_c_includes.h',
       'tests/all_cpp_includes.h',
       'tests/arch_dependent_sizes_32.h',
       'tests/arch_dependent_sizes_64.h',
       'tests/pp_thread.h',
       'tests/test_case.cc',
       'tests/test_case.h',
+      'tests/test_host_resolver_private.cc',
+      'tests/test_host_resolver_private.h',
       'tests/test_net_address_private_untrusted.cc',
       'tests/test_net_address_private_untrusted.h',
       'tests/test_tcp_server_socket_private.cc',
       'tests/test_tcp_server_socket_private.h',
       'tests/test_tcp_socket_private_shared.cc',
       'tests/test_tcp_socket_private_shared.h',
       'tests/test_udp_socket_private_shared.cc',
       'tests/test_udp_socket_private_shared.h',
       'tests/test_utils.cc',
       'tests/testing_instance.cc',
@@ skipping 72 matching lines @@
       'tests/test_flash_fullscreen.cc',
       'tests/test_flash_fullscreen.h',
       'tests/test_flash_message_loop.cc',
       'tests/test_flash_message_loop.h',
       'tests/test_fullscreen.cc',
       'tests/test_fullscreen.h',
       'tests/test_graphics_2d.cc',
       'tests/test_graphics_2d.h',
       'tests/test_graphics_3d.cc',
       'tests/test_graphics_3d.h',
       'tests/test_host_resolver_private.cc',

[bbudge, 2012/03/16 16:50:40]

You could remove these here.

[ygorshenin1, 2012/03/19 08:16:05]

Done.

       'tests/test_host_resolver_private.h',
       'tests/test_image_data.cc',
       'tests/test_image_data.h',
       'tests/test_input_event.cc',
       'tests/test_input_event.h',
       'tests/test_memory.cc',
       'tests/test_memory.h',
       'tests/test_net_address_private.cc',
       'tests/test_net_address_private.h',
       'tests/test_network_monitor_private.cc',
@@ skipping 42 matching lines @@
           'c/dev/ppb_transport_dev.h',
         ],
         'cpp_source_files': [
           'cpp/dev/transport_dev.cc',
           'cpp/dev/transport_dev.h',
         ],
       },
     }],
   ],
 }