Revert "Revert "[automerge] Check if JSSandbox available before ..."

Revert^2 "Create and use a shared Executor for timeouts"

348130c8ee0c7b9adcc57baf9d8a8409829e2b5e

Change-Id: I83c07d024620365d3cd6158f242a847de2dbf416
6 files changed