Make TestWebIDBFactory allocate a separate WebIDBFactory per thread.

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 36 matching lines @@
         'platform_support_android.cc',
         'platform_support_linux.cc',
         'platform_support_mac.mm',
         'platform_support_win.cc',
         'test_media_stream_client.cc',
         'test_media_stream_client.h',
         'test_stream_texture_factory_android.cc',
         'test_stream_texture_factory_android.h',
         'test_webkit_platform_support.cc',
         'test_webkit_platform_support.h',
+        'test_webidbfactory.cc',
+        'test_webidbfactory.h',
         'test_webmessageportchannel.cc',
         'test_webmessageportchannel.h',
         'test_webplugin_page_delegate.cc',
         'test_webplugin_page_delegate.h',
         'webkit_support.cc',
         'webkit_support.h',
         'webkit_support_glue.cc',
         'weburl_loader_mock.cc',
         'weburl_loader_mock.h',
         'weburl_loader_mock_factory.cc',
@@ skipping 98 matching lines @@
         '<(DEPTH)',
       ],
       'conditions': [
           ['OS=="android"', {
               'toolsets': ['target', 'host'],
           }],
       ],
     },
   ],
 }