Remove gc extension from webkit/support

webkit/support/webkit_support.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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 29 matching lines @@
         '<(SHARED_INTERMEDIATE_DIR)/webkit', # for a header generated by grit
       ],
       'defines': [
         # Technically not a unit test but require functions available only to
         # unit tests.
         'UNIT_TEST'
       ],
       'sources': [
         'drt_application_mac.h',
         'drt_application_mac.mm',
-        'gc_extension.cc',
-        'gc_extension.h',
         'platform_support.h',
         'platform_support_android.cc',
         'platform_support_linux.cc',
         'platform_support_mac.mm',
         'platform_support_win.cc',
         'test_webkit_platform_support.cc',
         'test_webkit_platform_support.h',
         'webkit_support.cc',
         'webkit_support.h',
         'webkit_support_glue.cc',
@@ skipping 51 matching lines @@
         '<(DEPTH)/webkit/support/mac/DumpRenderTreePasteboard.h',
         '<(DEPTH)/webkit/support/mac/DumpRenderTreePasteboard.m',
         '<(DEPTH)/webkit/support/mock_webclipboard_impl.cc',
         '<(DEPTH)/webkit/support/mock_webclipboard_impl.h',
       ],
       # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },
   ],
 }