yes  i am not sure why the original code did not hit the dcheck failure  timing issue when i ran unit tests w o this  copy i got following check failures run dedicatedworkertest pendingactivity setinterval fatal stringimpl h check failed  isstatic verifier  onref ref count x f  ee b b base  debug  stacktrace  stacktrace x f  ee c base  debug  stacktrace  stacktrace x f  ee a  logging  logmessage logmessage x f  e c c  what the   fuck   stringimpl  ref x f  e c  a what the   fuck   refifnotnull x f  e c what the   fuck   refptr refptr x f  e c fd what the   fuck   string  string x f  e a  f blink  kurl  kurl x f  eb c efb blink  workerthread  initializeonworkerthread  