Create a spellcheck component that will allow any embedder to reuse common functionality.

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 3502 matching lines @@
           ],
         }],
         ['branding!="Chrome"', {
           'sources': [
             'browser/search/local_files_ntp_source.cc',
             'browser/search/local_files_ntp_source.h',
           ],
         }],
         ['enable_spellcheck==1', {
           'sources': [ '<@(chrome_browser_spellchecker_sources)' ],
+          'dependencies': [
+            '../components/components.gyp:spellcheck_common',
+          ],
           'conditions': [
             ['OS!="android"', {
               'dependencies': [
                 '../third_party/hunspell/hunspell.gyp:hunspell',
               ],
             }],
           ],
         }],
         ['disable_nacl==0', {
           'sources': [ '<@(chrome_browser_nacl_sources)' ],
@@ skipping 673 matching lines @@
             '../components/components.gyp:rlz',
             '../components/components.gyp:search_engines',
             '../rlz/rlz.gyp:rlz_lib',
             'common',
           ],
         },
       ],
     }],
   ],
 }