Register data_reduction_proxy prefs on iOS.

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': [
     {
@@ skipping 35 matching lines @@
         '../../breakpad/breakpad.gyp:breakpad_client',
         '../../components/components.gyp:autofill_core_browser',
         '../../components/components.gyp:autofill_core_common',
         '../../components/components.gyp:autofill_ios_browser',
         '../../components/components.gyp:bookmarks_browser',
         '../../components/components.gyp:bookmarks_managed',
         '../../components/components.gyp:component_updater',
         '../../components/components.gyp:content_settings_core_browser',
         '../../components/components.gyp:crash_core_browser',
         '../../components/components.gyp:crash_core_common',
+        '../../components/components.gyp:data_reduction_proxy_core_browser',
         '../../components/components.gyp:data_reduction_proxy_core_common',
         '../../components/components.gyp:dom_distiller_core',
         '../../components/components.gyp:dom_distiller_ios',
         '../../components/components.gyp:enhanced_bookmarks',
         '../../components/components.gyp:favicon_base',
         '../../components/components.gyp:favicon_core',
         '../../components/components.gyp:gcm_driver',
         '../../components/components.gyp:google_core_browser',
         '../../components/components.gyp:history_core_browser',
         '../../components/components.gyp:history_ios_browser',
@@ skipping 610 matching lines @@
             '../../components/components.gyp:omnibox_browser',
             '../../components/components.gyp:rlz',
             '../../components/components.gyp:search_engines',
             '../../rlz/rlz.gyp:rlz_lib',
           ],
         },
       ],
     }],
   ],
 }