old_contents: def cvt(s):
      if isinstance(s, str): 
          return unicode(s)
      return s
  
new_contents: def cvt(s):
      if isinstance(s, str): 
          return unicode(s)
      return s
  
  class GWTCanvasImplDefault:
  
      def createElement(self):
          e = DOM.createElement("CANVAS")
          self.setCanvasContext(e.MozGetIPCContext(u'2d'))
          return e
  
  
  
subject: add mozilla strange version of getCanvas to hulahop override