fixed crash in broswer.
fixed crash in broswer.

PluginCordova/cordova-plugin-themeablebrowser,PluginCordova/cordova-plugin-themeablebrowser,PluginCordova/cordova-plugin-themeablebrowser,PluginCordova/cordova-plugin-themeablebrowser,PluginCordova/cordova-plugin-themeablebrowser