这种错误，可以在loadurl之后再调用 localstorage。setitem（）即可解决。
"Uncaught SecurityError: Failed to read the ‘localStorage‘ property from ‘Window‘: Access is denied for this document.", source: (1)
android webview "Uncaught SecurityError: Failed to read the 'localStorage' property from 'Window': Access is denied for this document.", source: (1)
原文：http://www.cnblogs.com/feitianlee/p/4305779.html
