[Contextual Search] Add Mojo-enabled API component.

chrome/chrome_browser.gypi

 # Copyright 2012 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': {
     # All .cc, .h, .m, and .mm files under browser except for:
     # * tests and mocks.
     # * code below browser/chromeos
     # * code below browser/extensions
@@ skipping 719 matching lines @@
       'browser/safe_browsing/safe_browsing_tab_observer.cc',
       'browser/safe_browsing/safe_browsing_tab_observer.h',
       'browser/safe_browsing/srt_fetcher_win.cc',
       'browser/safe_browsing/srt_fetcher_win.h',
       'browser/safe_browsing/srt_field_trial_win.cc',
       'browser/safe_browsing/srt_field_trial_win.h',
       'browser/safe_browsing/srt_global_error_win.cc',
       'browser/safe_browsing/srt_global_error_win.h',
       'browser/search/contextual_search_policy_handler_android.cc',
       'browser/search/contextual_search_policy_handler_android.h',
+      'browser/search/contextual_search_service.cc',
+      'browser/search/contextual_search_service.h',
       'browser/search/iframe_source.cc',
       'browser/search/iframe_source.h',
       'browser/search/instant_io_context.cc',
       'browser/search/instant_io_context.h',
       'browser/search/instant_service.cc',
       'browser/search/instant_service.h',
       'browser/search/instant_service_factory.cc',
       'browser/search/instant_service_factory.h',
       'browser/search/instant_service_observer.cc',
       'browser/search/instant_service_observer.h',
@@ skipping 3364 matching lines @@
             '../components/components.gyp:omnibox_browser',
             '../components/components.gyp:rlz',
             '../components/components.gyp:search_engines',
             '../rlz/rlz.gyp:rlz_lib',
           ],
         },
       ],
     }],
   ],
 }