components: Extract pref_registry component out of user_prefs.

components/translate.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': [
     {
       'target_name': 'translate_core_browser',
       'type': 'static_library',
       'dependencies': [
         '../base/base.gyp:base',
         '../google_apis/google_apis.gyp:google_apis',
         '../net/net.gyp:net',
         '../ui/base/ui_base.gyp:ui_base',
         '../url/url.gyp:url_lib',
         'components_resources.gyp:components_resources',
         'language_usage_metrics',
+        'pref_registry',
         'translate_core_common',
-        'user_prefs',
       ],
       'include_dirs': [
         '..',
       ],
       'sources': [
         'translate/core/browser/language_state.cc',
         'translate/core/browser/language_state.h',
         'translate/core/browser/page_translated_details.h',
         'translate/core/browser/translate_accept_languages.cc',
         'translate/core/browser/translate_accept_languages.h',
@@ skipping 112 matching lines @@
           ],
           'sources': [
             'translate/content/common/translate_messages.cc',
             'translate/content/common/translate_messages.h',
            ],
         },
       ],
     }],
   ],
 }