old_contents: import webapp2
  
  class MainPage(webapp2.RequestHandler):
      def get(self):
          self.response.write(file('index.html').read())
  
  application = webapp2.WSGIApplication([
      ('/', MainPage),
  ], debug=True)
  
new_contents: import webapp2
  
  class MainPage(webapp2.RequestHandler):
      def get(self):
          self.response.write(file('index.html').read())
  
  class GoogleWebmasterVerifier(webapp2.RequestHandler):
      def get(self):
          self.response.write(file('google7e0693b4ccda33f7.html').read())
  
  application = webapp2.WSGIApplication([
      ('/google7e0693b4ccda33f7.html', GoogleWebmasterVerifier),
      ('/', MainPage)
  ], debug=True)
  
subject: Add Google Webmaster verification handler.