Add support for providing an external file for extracting content.

ios/chrome/ios_chrome.gyp

 # Copyright 2014 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': {
     'chromium_code': 1,
    },
   'targets': [
     {
       'target_name': 'ios_chrome_browser',
       'type': 'static_library',
       'include_dirs': [
         '../..',
       ],
       'dependencies': [
         '../../base/base.gyp:base',
+        '../../components/components_resources.gyp:components_resources',
         '../../components/components.gyp:dom_distiller_core',
         '../../components/components.gyp:dom_distiller_ios',
         '../../components/components.gyp:infobars_core',
         '../../components/components.gyp:keyed_service_core',
         '../../components/components.gyp:keyed_service_ios',
         '../../components/components.gyp:leveldb_proto',
         '../../components/components.gyp:suggestions',
         '../../components/components.gyp:translate_core_browser',
         '../../components/components.gyp:translate_ios_browser',
         '../../components/components.gyp:web_resource',
@@ skipping 95 matching lines @@
         'browser/ui/uikit_ui_util.mm',
         'browser/ui/url_loader.h',
         'browser/web/dom_altering_lock.h',
         'browser/web/dom_altering_lock.mm',
         'browser/web_resource/ios_web_resource_service.cc',
         'browser/web_resource/ios_web_resource_service.h',
       ],
     },
   ],
 }