Fix: Chrome WebView not allowed to run in different threads. Reproduced ...

...on Android Kitkat

Error: java.lang.RuntimeException: java.lang.Throwable: A WebView method was called on thread . All WebView methods must be called on the same thread. (Expected Looper Looper (main, tid 1) called on null, FYI main Looper is Looper (main, tid 1) )