Add change log viewer for V8.

dashboard/svn-log

 #!/usr/bin/python
 
 import os
 import re
 import subprocess
 import sys
 
 try:
   options = {}
   query_string = os.environ['QUERY_STRING'].split('&')
   for q in query_string:
     opt = q.split('=')
     options[opt[0]] = opt[1]
   if ('range' not in options or 'url' not in options or
       not (options['url'].startswith('http://src.chromium.org/svn/') or
-           options['url'].startswith('http://webrtc.googlecode.com/svn/')) or
+           options['url'].startswith('http://webrtc.googlecode.com/svn/') or
+           options['url'].startswith('http://v8.googlecode.com/svn/')) or
       not re.match(r'^(\d+):(\d+)$', options['range'])):
     print 'Content-Type: text/html'
     print ''
     print ''
     sys.exit(1)
   c = ['svn', 'log', '--xml', '-v', '-r', options['range'], options['url']]
   print 'Content-Type: text/xml'
   print ''
   sys.stdout.flush()
   subprocess.call(c)
 except Exception, e:
   sys.stderr.write(e)