Fix #15740 - now check for immediate errors from async i/o calls. Also ensure that io_pending flag for the thread is cleared if we complete the async call before calling WaitOnThisThread(). r=sfraser
Fix #15740 - now check for immediate errors from async i/o calls. Also ensure that io_pending flag for the thread is cleared if we complete the async call before calling WaitOnThisThread(). r=sfraser

makotokato/nsprpub,makotokato/nsprpub,makotokato/nsprpub,makotokato/nsprpub,makotokato/nsprpub