Add gn implementation for //components/dom_distiller/ios.

components/dom_distiller.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.
 
 {
   'targets': [
     {
       # GN version: //components/dom_distiller/webui
       'target_name': 'dom_distiller_webui',
       'type': 'static_library',
@@ skipping 238 matching lines @@
             'dom_distiller/content/renderer/distiller_page_notifier_service_impl.cc',
             'dom_distiller/content/renderer/distiller_page_notifier_service_impl.h',
           ],
         },
 
       ],
     }],
     ['OS=="ios"', {
       'targets': [
         {
+          # GN version: //components/dom_distiller/ios
           'target_name': 'dom_distiller_ios',
           'type': 'static_library',
           'dependencies': [
             '../ios/provider/ios_provider_web.gyp:ios_provider_web',
             'dom_distiller_protos',
             'dom_distiller_core',
           ],
           'include_dirs': [
             '..',
           ],
@@ skipping 80 matching lines @@
           'variables': {
             'package_name': 'org/chromium/components/dom_distiller/core',
             'template_deps': ['dom_distiller/core/theme_list.h'],
           },
           'includes': [ '../build/android/java_cpp_template.gypi' ],
         },
       ],
     }],
   ],
 }