Some minor refactorings.
Some minor refactorings.

yeahdongcn/DZNWebViewController,imjerrybao/DZNWebViewController,yeahdongcn/DZNWebViewController,Pitometsu/CruiserWebViewController,yeahdongcn/DZNWebViewController,imjerrybao/DZNWebViewController,Pitometsu/CruiserWebViewController,iorikingdom/DZNWebViewController,imjerrybao/DZNWebViewController,RobotsAndPencils/DZNWebViewController,imjerrybao/DZNWebViewController,orta/DZNWebViewController,Pitometsu/CruiserWebViewController,yeahdongcn/DZNWebViewController,imjerrybao/DZNWebViewController,orta/DZNWebViewController,GaoZhenWei/CruiserWebViewController,dzenbot/DZNWebViewController,orta/DZNWebViewController,orta/DZNWebViewController,macoscope/DZNWebViewController,Pitometsu/CruiserWebViewController