Remove inside_chromium_build gyp variable

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 137 matching lines @@
         '<(DEPTH)/webkit/fileapi/mock_file_system_options.h',
         '<(DEPTH)/webkit/mocks/mock_webhyphenator.cc',
         '<(DEPTH)/webkit/mocks/mock_webhyphenator.h',
         '<(DEPTH)/webkit/mocks/test_media_stream_client.cc',
         '<(DEPTH)/webkit/mocks/test_media_stream_client.h',
         '<(DEPTH)/webkit/quota/mock_special_storage_policy.cc',
         '<(DEPTH)/webkit/quota/mock_special_storage_policy.h',
         'simple_database_system.cc',
         'simple_database_system.h',
       ],
-      'conditions': [
-        ['inside_chromium_build==0', {
-          'dependencies': [
-            'setup_third_party.gyp:third_party_headers',
-          ],
-        }],
-      ],
       # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
       'msvs_disabled_warnings': [ 4267, ],
     },
 
     {
       'target_name': 'webkit_support_gfx',
       'type': 'static_library',
       'variables': { 'enable_wexit_time_destructors': 1, },
       'dependencies': [
         '<(DEPTH)/third_party/libpng/libpng.gyp:libpng',
         '<(DEPTH)/third_party/zlib/zlib.gyp:zlib',
       ],
       'sources': [
         'webkit_support_gfx.h',
         'webkit_support_gfx.cc',
       ],
       'include_dirs': [
         '<(DEPTH)',
       ],
       'conditions': [
           ['OS=="android"', {
               'toolsets': ['target', 'host'],
           }],
       ],
     },
   ],
 }