Make Mac swap code like other platforms

gpu/gpu_ipc_client.gypi

 # Copyright (c) 2016 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.
 
 {
   'dependencies': [
     '../base/base.gyp:base',
     '../ipc/ipc.gyp:ipc',
     '../third_party/khronos/khronos.gyp:khronos_headers',
     '../ui/base/ui_base.gyp:ui_base',
@@ skipping 34 matching lines @@
         'ipc/client/gpu_memory_buffer_impl_surface_texture.cc',
         'ipc/client/gpu_memory_buffer_impl_surface_texture.h',
         'ipc/client/android/in_process_surface_texture_manager.cc',
         'ipc/client/android/in_process_surface_texture_manager.h',
       ],
     }],
     ['OS == "mac"', {
       'sources+': [
         'ipc/client/gpu_memory_buffer_impl_io_surface.cc',
         'ipc/client/gpu_memory_buffer_impl_io_surface.h',
+        'ipc/client/gpu_process_hosted_ca_layer_tree_params.cc',
+        'ipc/client/gpu_process_hosted_ca_layer_tree_params.h',
       ],
     }],
     ['use_ozone == 1', {
       'sources+': [
         'ipc/client/gpu_memory_buffer_impl_ozone_native_pixmap.cc',
         'ipc/client/gpu_memory_buffer_impl_ozone_native_pixmap.h',
       ],
       'dependencies': [
         '../ui/ozone/ozone.gyp:ozone_platform',
       ],
     }],
   ],
   # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
   'msvs_disabled_warnings': [4267, ],
 }