Add running unit tests to run-bindings-tests.

third_party/WebKit/Tools/Scripts/test-webkitpy

 #!/usr/bin/env python
 # Copyright (c) 2011 Google Inc. All rights reserved.
 # Copyright (C) 2010 Chris Jerdonek (cjerdonek@webkit.org)
 #
 # 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.
@@ skipping 13 matching lines @@
 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 import os
 import sys
 
-dirname = os.path.dirname
-scripts_dir = dirname(os.path.realpath(__file__))
-chromium_src_dir = dirname(dirname(dirname(dirname(scripts_dir))))
-
-path_to_typ = os.path.join(chromium_src_dir, 'third_party', 'typ')
-if path_to_typ not in sys.path:
-    sys.path.append(path_to_typ)
+from webkitpy.common import webkit_finder
+webkit_finder.add_typ_dir_to_sys_path()
 
 import typ
 
 skip = []
 if sys.platform == 'win32':
     # These test fail on win32. We could annotate some of these in
     # class-level skips, but we don't support package/module-level skips.
     # bugs.webkit.org/show_bug.cgi?id=54526 .
     skip = [
         'webkitpy.common.checkout.*',
         'webkitpy.common.config.*',
         'webkitpy.tool.*',
         'webkitpy.w3c.*',
         'webkitpy.layout_tests.layout_package.bot_test_expectations_unittest.*',
     ]
 
-sys.exit(typ.main(top_level_dir=scripts_dir,
+sys.exit(typ.main(top_level_dir=webkit_finder.get_scripts_dir(),
                   skip=skip,
-                  path=[os.path.join(scripts_dir, 'webkitpy', 'thirdparty')],
+                  path=[webkit_finder.get_webkitpy_thirdparty_dir()],
                   win_multiprocessing='spawn'))