Random String Generator

This is a simple Random String Generator.
The algorism of this extension can be used in the android app[ https://play.google.com/store/apps/details?id=net.aerotrial.demo.randomstringgenerator ].
So, you can generate the same random string from same seed between your pc chrome and android phone.

[Update info]
v1.2:
* Adapt a seed of Japanese charsets
* some bug fixes