Remove unused WEBKIT_DEPRECATED thread

content/content_browser.gypi

 # Copyright (c) 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.
 
 {
   'dependencies': [
     'browser/speech/proto/speech_proto.gyp:speech_proto',
     '../base/base.gyp:base_static',
     '../crypto/crypto.gyp:crypto',
     '../google_apis/google_apis.gyp:google_apis',
@@ skipping 540 matching lines @@
     'browser/histogram_message_filter.h',
     'browser/histogram_subscriber.h',
     'browser/histogram_synchronizer.cc',
     'browser/histogram_synchronizer.h',
     'browser/host_zoom_map_impl.cc',
     'browser/host_zoom_map_impl.h',
     'browser/hyphenator/hyphenator_message_filter.cc',
     'browser/hyphenator/hyphenator_message_filter.h',
     'browser/in_process_webkit/browser_webkitplatformsupport_impl.cc',
     'browser/in_process_webkit/browser_webkitplatformsupport_impl.h',
-    'browser/in_process_webkit/webkit_thread.cc',
-    'browser/in_process_webkit/webkit_thread.h',
     'browser/indexed_db/indexed_db.h',
     'browser/indexed_db/indexed_db_backing_store.cc',
     'browser/indexed_db/indexed_db_backing_store.h',
     'browser/indexed_db/indexed_db_callbacks.cc',
     'browser/indexed_db/indexed_db_callbacks.h',
     'browser/indexed_db/indexed_db_connection.cc',
     'browser/indexed_db/indexed_db_connection.h',
     'browser/indexed_db/indexed_db_context_impl.cc',
     'browser/indexed_db/indexed_db_context_impl.h',
     'browser/indexed_db/indexed_db_cursor.cc',
@@ skipping 891 matching lines @@
         '../third_party/speex/speex.gyp:libspeex',
       ],
     }],
     ['linux_use_libgps==1', {
       'dependencies': [
         '../build/linux/system.gyp:libgps',
       ],
     }],
   ],
 }