Check in the thirdparty libs needed for webkitpy.

Tools/Scripts/webkitpy/thirdparty/webpagereplay/third_party/dns/ipv4.py

+# Copyright (C) 2003-2007, 2009, 2010 Nominum, Inc.
+#
+# Permission to use, copy, modify, and distribute this software and its
+# documentation for any purpose with or without fee is hereby granted,
+# provided that the above copyright notice and this permission notice
+# appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+"""IPv4 helper functions."""
+
+import socket
+import sys
+
+if sys.hexversion < 0x02030000 or sys.platform == 'win32':
+    #
+    # Some versions of Python 2.2 have an inet_aton which rejects
+    # the valid IP address '255.255.255.255'.  It appears this
+    # problem is still present on the Win32 platform even in 2.3.
+    # We'll work around the problem.
+    #
+    def inet_aton(text):
+        if text == '255.255.255.255':
+            return '\xff' * 4
+        else:
+            return socket.inet_aton(text)
+else:
+    inet_aton = socket.inet_aton
+
+inet_ntoa = socket.inet_ntoa