Add wtf_unittests target that links unit tests outside DLL

Source/bindings/bindings.gyp

 #
 # Copyright (C) 2013 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 42 matching lines @@
         '<(DEPTH)/third_party/libxml/libxml.gyp:libxml',
         '<(DEPTH)/third_party/libxslt/libxslt.gyp:libxslt',
         '<(DEPTH)/third_party/libwebp/libwebp.gyp:libwebp',
         '<(DEPTH)/third_party/npapi/npapi.gyp:npapi',
         '<(DEPTH)/third_party/qcms/qcms.gyp:qcms',
         '<(DEPTH)/third_party/sqlite/sqlite.gyp:sqlite',
         '<(DEPTH)/third_party/v8-i18n/build/all.gyp:v8-i18n',
         '<(DEPTH)/v8/tools/gyp/v8.gyp:v8',
         '<(libjpeg_gyp_path):libjpeg',
       ],
+      'defines': [
+        'WEBKIT_IMPLEMENTATION=1',
+      ],
       'include_dirs': [
         # FIXME:  Remove <(SHARED_INTERMEDIATE_DIR)/webcore when we
         # can entice gyp into letting us put both the .cpp and .h
         # files in the same output directory.
         '<(SHARED_INTERMEDIATE_DIR)/webcore',
       ],
       'xcode_settings': {
         # Some Mac-specific parts of WebKit won't compile without having this
         # prefix header injected.
         # FIXME: make this a first-class setting.
@@ skipping 11 matching lines @@
         }],
         ['OS in ("linux", "android") and "WTF_USE_WEBAUDIO_IPP=1" in feature_defines', {
           'cflags': [
             '<!@(pkg-config --cflags-only-I ipp)',
           ],
         }],
       ],
     },
   ],
 }