Unify the three places that patch font loading for PDFium on Windows.

content/content_child.gypi

 # Copyright 2013 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',
     '../components/tracing.gyp:tracing',
     '../mojo/mojo_base.gyp:mojo_environment_chromium',
     '../mojo/mojo_base.gyp:mojo_common_lib',
     '../skia/skia.gyp:skia',
     '../ui/base/ui_base.gyp:ui_base',
     '../ui/gfx/gfx.gyp:gfx',
     '../ui/gfx/gfx.gyp:gfx_geometry',
     '../url/url.gyp:url_lib',
     'content_common_mojo_bindings.gyp:content_common_mojo_bindings',
   ],
   'include_dirs': [
     '..',
   ],
   'export_dependent_settings': [
     '../base/base.gyp:base',
   ],
   'variables': {
     'public_child_sources': [
+      'public/child/child_thread.h',
       'public/child/image_decoder_utils.h',
       'public/child/request_peer.h',
       'public/child/resource_dispatcher_delegate.h',
     ],
     'private_child_sources': [
       'child/appcache/appcache_backend_proxy.cc',
       'child/appcache/appcache_backend_proxy.h',
       'child/appcache/appcache_dispatcher.cc',
       'child/appcache/appcache_dispatcher.h',
       'child/appcache/appcache_frontend_impl.cc',
@@ skipping 18 matching lines @@
       'child/child_histogram_message_filter.cc',
       'child/child_histogram_message_filter.h',
       'child/child_message_filter.cc',
       'child/child_message_filter.h',
       'child/child_process.cc',
       'child/child_process.h',
       'child/child_resource_message_filter.cc',
       'child/child_resource_message_filter.h',
       'child/child_shared_bitmap_manager.cc',
       'child/child_shared_bitmap_manager.h',
-      'child/child_thread.cc',
-      'child/child_thread.h',
+      'child/child_thread_impl.cc',
+      'child/child_thread_impl.h',
       'child/content_child_helpers.cc',
       'child/content_child_helpers.h',
       'child/database_util.cc',
       'child/database_util.h',
       'child/db_message_filter.cc',
       'child/db_message_filter.h',
       'child/file_info_util.cc',
       'child/file_info_util.h',
       'child/fileapi/file_system_dispatcher.cc',
       'child/fileapi/file_system_dispatcher.h',
@@ skipping 318 matching lines @@
         }, {
           'dependencies': [
             '../third_party/nss/nss.gyp:nspr',
             '../third_party/nss/nss.gyp:nss',
           ],
         }],
       ],
     }],
   ],
 }