new_contents: from provider import CDNProvider
  
  
  class Google(CDNProvider):
      base_url = "//ajax.googleapis.com/ajax/libs/%s/%s/%s"
  
      def angular(self, version):
          return self._build_js_url("angularjs", version, "angular")
  
      def chrome_frame(self, version):
          return self._build_js_url("chrome-frame", version, "CFInstall")
  
      def jquery(self, version):
          return self._build_js_url("jquery", version)
  
      def ext_core(self, version):
          return self._build_js_url("ext-core", version)
  
      def jquery_ui(self, version):
          return self._build_js_url("jqueryui", version, "jquery-ui")
  
      def mootools(self, version):
          return self._build_js_url("mootools", version)
  
      def prototype(self, version):
          return self._build_js_url("prototype", version)
  
      def scriptaculos(self, version):
          return self._build_js_url("scriptaculos", version)
  
      def swfobject(self, version):
          return self._build_js_url("swfobject", version)
  
      def webfont(self, version):
          return self._build_js_url("webfont", version)
  
subject: Add Google backend