[Blink] Update spellcheck watchlist.

WATCHLISTS

 # Copyright (c) 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.
 
 # Watchlist Rules
 # Refer: http://dev.chromium.org/developers/contributing-code/watchlists
 
 # IMPORTANT: The regular expression filepath is tested against each path using
 # re.search, so it is not usually necessary to add .*.
 
@@ skipping 265 matching lines @@
       'filepath': 'Source/modules/serviceworkers' \
                   '|LayoutTests/http/tests/serviceworker'
     },
     'serviceworkers_tests' : {
       'filepath': 'LayoutTests/http/tests/serviceworker'
     },
     'sheriff_o_matic' : {
       'filepath': 'Tools/GardeningServer'
     },
     'spellcheck' : {
-      'filepath':  'Source/core/editing/Editor' \
-                   '|Source/core/editing/Spell' \
-                   '|Source/core/editing/TextCheckingHelper' \
-                   '|Source/platform/text/TextCheck' \
-                   '|Source/web/EditorClientImpl' \
-                   '|LayoutTests/editing/spelling' \
-                   '|public/web/WebSpellCheckClient.h',
+      'filepath':  'Source/core/editing/spellcheck'
     },
     'style': {
       'filepath': 'style/|Style',
     },
     'svg': {
       'filepath': 'Source/core/svg|Source/core/layout/svg',
     },
     'test_runner': {
       'filepath': 'Tools/DumpRenderTree/chromium/TestRunner',
     },
@@ skipping 225 matching lines @@
                     'yhirano+watch@chromium.org' ],
     'workers': [ 'blink-worker-reviews@chromium.org',
                  'kinuko+worker@chromium.org',
                  'horo+watch@chromium.org',
                  'falken@chromium.org' ],
     'wtf': [ 'mikhail.pozdnyakov@intel.com',
              'blink-reviews-wtf@chromium.org' ],
     'xmlhttprequest': [ 'tyoshino+watch@chromium.org' ],
   },
 }